1 00:00:33,479 --> 00:00:37,520 What's up everybody? Thanks for coming to visit me again. At another episode 2 00:00:37,560 --> 00:00:41,359 of Let's Ask Paul, the podcast where I, Paul Abernathy, try to 3 00:00:41,399 --> 00:00:46,320 answer all your pressing electrical related questions. How do I do that? You 4 00:00:46,479 --> 00:00:50,920 just simply go to Paul Abernathy dot com, submit your question and I will 5 00:00:50,920 --> 00:00:55,920 reply back either in an email or if selected, it will be utilized obviously 6 00:00:56,000 --> 00:01:02,240 anonymously. We won't mention your name on an upcoming podcast much like this one. 7 00:01:02,759 --> 00:01:06,159 So if you've never listened to my podcast before, I go all over 8 00:01:06,200 --> 00:01:10,760 the place. Everybody knows I notoriously suffer from a bad case of attention depths 9 00:01:10,760 --> 00:01:14,680 at disorder. I'm all over the place. I love this industry with a 10 00:01:14,719 --> 00:01:19,480 passion, so I am all over the place on all types of topics, 11 00:01:19,519 --> 00:01:25,799 teaching you know, all different things when it comes to electrical but one of 12 00:01:25,879 --> 00:01:29,480 the key things is to make sure that I answer your questions. And so 13 00:01:29,640 --> 00:01:33,359 that's something that I enjoy doing. And so if you've got questions, just 14 00:01:33,400 --> 00:01:37,799 go to Paul Abernathy dot com and submit your questions and you can listen to 15 00:01:37,840 --> 00:01:42,879 our podcasts and we have over a thousand episodes dating back many years on all 16 00:01:42,920 --> 00:01:48,439 different types of topics that are still domine today. They're still very relevant. 17 00:01:48,519 --> 00:01:52,799 I don't really do podcasts that are kind of locked in a time machine. 18 00:01:53,359 --> 00:01:57,640 They're all over the place and they're all going to be informative for you. 19 00:01:57,439 --> 00:01:59,760 You may get something out of it, you may not, you know, 20 00:01:59,840 --> 00:02:02,319 but again it's it's I think it's worth a listen, and we appreciate the 21 00:02:02,359 --> 00:02:07,079 support that you've given us and sharing our podcast and giving us the thumbs up 22 00:02:07,079 --> 00:02:09,439 and the likes. It all helps on all of our platforms. You know, 23 00:02:09,479 --> 00:02:12,879 I have my share of haters out there, and there's that one guy 24 00:02:13,240 --> 00:02:15,560 who's got a thumbs down everything I do, and he knows I know who 25 00:02:15,599 --> 00:02:21,719 he is because I obviously track his ISP. But again for the fact that 26 00:02:21,759 --> 00:02:24,280 I don't mind you just you know, go ahead. But if you like 27 00:02:24,360 --> 00:02:29,039 what we do, do your favor. Let everybody know, thumbs up, 28 00:02:29,080 --> 00:02:31,680 share it with other people, Let people know in your company that we have 29 00:02:31,719 --> 00:02:36,639 a podcast, get them listening to it. Also, get our free mobile 30 00:02:36,680 --> 00:02:40,680 app. All you got to do is go to our website fast tracks System 31 00:02:42,120 --> 00:02:46,319 dot com, f A S T t R A X S Y S t 32 00:02:46,439 --> 00:02:52,680 E M dot com check it out and you can go to the navigational link 33 00:02:52,719 --> 00:02:55,599 and you'll see mobile app and basically just just download it. It doesn't put 34 00:02:55,599 --> 00:03:00,680 anything on your phone except for a link, so it's not available in your 35 00:03:00,719 --> 00:03:05,439 app store. You can't get it in a Google store, Amazon or whatever 36 00:03:05,479 --> 00:03:09,560 the the what is that iPhone store? Apple Store? No, you only 37 00:03:09,599 --> 00:03:14,319 get it from our website, so check it out. And if you don't 38 00:03:14,360 --> 00:03:16,080 like going to my website, there's another way you can get it. Just 39 00:03:16,159 --> 00:03:24,240 go to any c ccha t that's anyc chat dot com, anyc chat dot 40 00:03:24,280 --> 00:03:28,280 com. You can download it from there as well. That's sponsored by Weeks 41 00:03:28,479 --> 00:03:31,719 as well, so check that out. All right. So if you're coming 42 00:03:31,759 --> 00:03:36,919 to this episode, you saw the title, it's talking about parallel circuits. 43 00:03:37,080 --> 00:03:39,800 But before you listen to this episode, I want to employ you to go 44 00:03:39,879 --> 00:03:46,080 back and listen to the Ohmslaw episode, which I believe is episode one seventy 45 00:03:46,159 --> 00:03:51,240 one of the Let's Ask Paul series, and then then you want to listen 46 00:03:51,280 --> 00:03:57,719 to the series Circuit podcast, which is episode one seventy two of this Let's 47 00:03:57,759 --> 00:04:01,479 Ask Paul series. Listen to those first. So if you're just stumbling onto 48 00:04:01,560 --> 00:04:08,159 this Parallel Circuit Podcast episode, go on and stop now and go on and 49 00:04:08,400 --> 00:04:12,919 go search for the series circuit one or the Ohms law one, because you 50 00:04:13,000 --> 00:04:16,839 need to understand Ohms law in order to be able to work an equation. 51 00:04:17,360 --> 00:04:20,920 And in the series podcast, I do an example of that in you know, 52 00:04:21,000 --> 00:04:25,959 in my long winded style. You know that everybody likes, you know, 53 00:04:27,439 --> 00:04:30,519 but I do it in order to break it down so that you can 54 00:04:30,600 --> 00:04:35,879 kind of mentally grow a picture of different equations and why we're doing what we 55 00:04:36,000 --> 00:04:41,439 do. So make sure you go watch those, or I shouldn't say watch, 56 00:04:41,560 --> 00:04:45,040 go listen to those, and maybe you're gonna listen to it a couple 57 00:04:45,000 --> 00:04:47,319 of times. Get your you know, get a piece of paper out, 58 00:04:47,639 --> 00:04:54,000 jot down the equations that as I as I describe them, and just work 59 00:04:54,000 --> 00:04:57,439 it. It's just gonna make you better. Or maybe maybe you don't do 60 00:04:57,480 --> 00:05:00,079 that and you just listen. That's fine, Okay, assuming you've done that 61 00:05:00,639 --> 00:05:03,480 and you're ready to go. Today, we're going to be talking a little 62 00:05:03,519 --> 00:05:10,040 bit about parallel circuits. Now. As I've said before, when it comes 63 00:05:10,079 --> 00:05:15,680 to serious circuits, chances are as an electrician, you're rarely going to ever 64 00:05:15,879 --> 00:05:19,480 use series or parallel calculations out in the field. I mean, let's be 65 00:05:19,560 --> 00:05:23,560 real, if you're a residential person, you partly will never do it, 66 00:05:24,120 --> 00:05:28,000 and most of the time you may be doing, if anything, a series 67 00:05:28,120 --> 00:05:32,319 calculation just because of the various loads of luminaires. Even though today most of 68 00:05:32,319 --> 00:05:36,600 the luminaires are going to be low wattage, you know, LED maybe a 69 00:05:36,680 --> 00:05:43,959 fluorescence, maybe it's CFLs or whatnot, that type of thing, so the 70 00:05:44,000 --> 00:05:46,920 loads of wattage wise is going to be very low. So maybe people don't 71 00:05:46,920 --> 00:05:49,600 do any of these calculations anymore. Really, to be honest with you, 72 00:05:50,680 --> 00:05:55,800 but when it comes to an electrical exam, you need to understand how to 73 00:05:55,800 --> 00:05:59,959 do the basics of a serious circuit, in the basics of a parallel circuit, 74 00:06:00,279 --> 00:06:02,120 and you need to know Ohm's law because in a lot of these questions, 75 00:06:02,160 --> 00:06:05,000 they're only going to give you certain variables, right, They're only going 76 00:06:05,079 --> 00:06:09,079 to give you the voltage and the amps, or they might give you the 77 00:06:09,120 --> 00:06:12,800 wattage and the voltage, and you're going to have to use the Ohms law 78 00:06:12,879 --> 00:06:16,319 formulas with an Ohms wheel that in many cases the exam gives you an Omes 79 00:06:16,360 --> 00:06:20,480 wheel, but if not, it's you don't want to try to remember all 80 00:06:20,519 --> 00:06:25,560 those So if you're in a state that allows you for your exam to write 81 00:06:25,560 --> 00:06:29,040 these formulas down, then you write them in the front of your code book 82 00:06:29,079 --> 00:06:30,800 where you have all those code panel members, you have all that blank space 83 00:06:30,839 --> 00:06:34,839 there, that's a great place to write them, jot them down, put 84 00:06:34,879 --> 00:06:38,560 an Ohm's law wheel there, maybe get an Olms law sticker and put an 85 00:06:38,600 --> 00:06:44,519 Olms law sticker there, or something to that nature. And that is going 86 00:06:44,560 --> 00:06:46,959 to be a good resource for you. And now if you're out in the 87 00:06:46,959 --> 00:06:50,720 field and you've already got your license, you know, then you can jot 88 00:06:50,759 --> 00:06:54,240 all these things down in your codebook anyway, and it's just good to have 89 00:06:54,319 --> 00:06:57,519 in case you need it. That type of thing. This is also a 90 00:06:57,519 --> 00:07:00,920 good opportunity for me to tell you that for voltage and things like that, 91 00:07:00,959 --> 00:07:06,040 we do have pocket edition voltage drop cards available over our website fasttracksystem dot com. 92 00:07:06,399 --> 00:07:11,720 They're like five ninety nine and that includes shipping. Check them out. 93 00:07:11,839 --> 00:07:15,000 They help support the show and they have also on the backside we show you 94 00:07:15,040 --> 00:07:18,519 how the twelve point nine for example, or the twenty one point two for 95 00:07:18,600 --> 00:07:24,399 aluminum, We show you how that's actually calculated, how that comes to be 96 00:07:24,800 --> 00:07:27,800 so it's kind of a nice little history deal. But we also give you 97 00:07:27,839 --> 00:07:30,680 the formulas for voltage drop find the maximum length, all that kind of stuff. 98 00:07:30,680 --> 00:07:33,759 What's the volts dropped? All that. So they're great little cards to 99 00:07:33,800 --> 00:07:38,839 have in your wallet and they help support the show. Go check those out 100 00:07:38,879 --> 00:07:43,480 over on fasttracksystem dot com. We'd love to have you get some of those. 101 00:07:44,000 --> 00:07:46,720 It's a two sided card, by the way, it shows the picture 102 00:07:46,759 --> 00:07:49,199 on the website two cards, but it's really just one card printed on both 103 00:07:49,240 --> 00:07:55,639 sides. All right. Anyway, that's all available, and again we appreciate 104 00:07:55,680 --> 00:07:59,839 the patronage. Okay, let's talk parallel circuit. So, as I told 105 00:07:59,879 --> 00:08:01,240 you in a previous episode, when it comes to series, there were some 106 00:08:01,240 --> 00:08:05,040 basic things to remember, and I don't want to rehash those, but if 107 00:08:05,079 --> 00:08:09,879 you remember when it comes to series circuits, the current stays the same at 108 00:08:09,879 --> 00:08:16,000 all your node points, all your load points. It is the the the 109 00:08:16,160 --> 00:08:22,040 voltage and the resistance that becomes additive. Okay, Now, if that doesn't 110 00:08:22,079 --> 00:08:24,759 make sense to you, then you do need to go back and listen to 111 00:08:24,800 --> 00:08:28,959 the series. One stop what you're doing right here before you get involved in 112 00:08:28,040 --> 00:08:33,120 parallels. You need to go back and watch that series edition or listen to 113 00:08:33,120 --> 00:08:37,200 that series edition. Trust me, and for everybody that says, Paul, 114 00:08:37,200 --> 00:08:39,519 I'm a visual learner, you need to do that in the video. We've 115 00:08:39,519 --> 00:08:43,120 got videos on this over on fast tracks Tube. I'm doing a podcast, 116 00:08:43,399 --> 00:08:48,320 so I understand. So as itchy as you have to make that kind of 117 00:08:48,360 --> 00:08:52,480 comment, please don't because it won't be seen and it won't matter. Okay, 118 00:08:52,679 --> 00:08:56,200 I'm just telling you from the kindness of my heart. This is a 119 00:08:56,240 --> 00:08:58,480 podcast. So one of the things that I try to do, and I 120 00:08:58,559 --> 00:09:05,759 pride my self one is trying to convey something in a mental picture that maybe 121 00:09:05,840 --> 00:09:09,279 will last. And that's part of the why I love podcasts because it's a 122 00:09:09,360 --> 00:09:13,399 challenge to do. So. All right, let's talk about excuse me, 123 00:09:13,440 --> 00:09:18,159 parallel circuits and see some of the general rules and we'll look over we'll talk 124 00:09:18,200 --> 00:09:22,559 about an example and how you would solve it. A parallel circuit is a 125 00:09:22,600 --> 00:09:26,799 circuit that has more than one path for which the electrons may flow. So 126 00:09:26,879 --> 00:09:31,360 when a serious circuit, it's just one continuous path. If you're buying into 127 00:09:31,399 --> 00:09:35,639 that kind of you know, electron flow theory, and we are. When 128 00:09:35,639 --> 00:09:37,639 we're trying to explain these concepts, it's not actually how it works with the 129 00:09:37,639 --> 00:09:43,279 electrons, but we get it. Okay, So if you think about a 130 00:09:43,320 --> 00:09:46,799 parallel the electrons go out, let's just say they go out. Let's for 131 00:09:46,840 --> 00:09:50,559 simplicity. I know I gonna have somebody on there to say that's not how 132 00:09:50,600 --> 00:09:52,960 that works, Paul. I'm like, dude, then you didn't listen to 133 00:09:52,960 --> 00:09:56,519 the whole damn podcast because we're talking about theory here to try to make it 134 00:09:56,559 --> 00:10:03,639 easy for you to understand. So when you have multiple paths parallel and the 135 00:10:03,679 --> 00:10:07,360 easiest way that I can explain this to people is because we've beat it to 136 00:10:07,480 --> 00:10:11,840 death for people. When it comes to series in parallel arcs with arc fault, 137 00:10:13,159 --> 00:10:16,679 is it a series arc is when there's an arcs that that's in series 138 00:10:16,679 --> 00:10:22,440 with the circuit, and a parallel arc is one that arcs across to conductors. 139 00:10:22,600 --> 00:10:24,240 Okay, it creates an arc, like an arc between the white and 140 00:10:24,279 --> 00:10:28,840 the black. Let's say, because you damage the non metallity sheaf cable with 141 00:10:28,879 --> 00:10:31,000 a staple, or you have an extension cord that you crush in the door. 142 00:10:31,159 --> 00:10:35,000 You get me, that's an arc. So there's multiple paths for it 143 00:10:35,039 --> 00:10:39,320 to return in a parallel with the series is only one path that it has 144 00:10:39,360 --> 00:10:45,559 to follow. So in a parallel, there's multiple paths that those electrons, 145 00:10:45,720 --> 00:10:50,759 if you will, could follow. All right, So there's some givens that 146 00:10:50,840 --> 00:10:54,960 you have to keep in mind when it comes to a parallel circuit. And 147 00:10:54,000 --> 00:10:58,320 we told you these givens again for the series circuit, was that the current 148 00:10:58,399 --> 00:11:03,519 remains the same at all resistive points, and it's the voltage and the resistance 149 00:11:03,559 --> 00:11:07,559 that are summations. They're additive. Well, now let's look at a parallel. 150 00:11:09,519 --> 00:11:13,360 So in a parallel, you've got somebody these rules. Now here's what's 151 00:11:13,399 --> 00:11:16,679 different. Whether the current in a series is different than it is in a 152 00:11:16,720 --> 00:11:22,080 parallel. Listen to this. The total current in a parallel is equal to 153 00:11:22,200 --> 00:11:28,080 this summation of the currents in all the branches of the circuit. So the 154 00:11:28,120 --> 00:11:33,639 first thing that you need to remember that you can live with remembering, is 155 00:11:33,679 --> 00:11:37,720 that when it comes to current in a series, it's fixed. When it 156 00:11:37,720 --> 00:11:43,840 comes to parallels, it's additive. Okay, okay, that's the first thing 157 00:11:43,879 --> 00:11:48,440 to remember. Next rule, and in other words, if I have three 158 00:11:48,519 --> 00:11:54,960 nodes of resistance, then the resistance at node one, excuse me three, 159 00:11:56,200 --> 00:12:01,440 you know, three loads, and the amps at node one it's going to 160 00:12:01,480 --> 00:12:03,720 be different than the amps at node two, which is going to be different 161 00:12:03,759 --> 00:12:07,960 than the amps and node three. You with me, okay, and you 162 00:12:09,120 --> 00:12:13,559 add them up, and that's going to give you the total current for that 163 00:12:13,840 --> 00:12:18,279 parallel circuit. Okay, it's not the same as you do for the series. 164 00:12:18,320 --> 00:12:22,879 Okay, Series, all of the points of the resistance or wherever, 165 00:12:22,960 --> 00:12:26,519 all the points of where the load is are going to be exactly the same 166 00:12:26,600 --> 00:12:30,960 current. That is not the same for the parallels. Okay, number two. 167 00:12:31,879 --> 00:12:39,399 Now here's what's similar to series. In a parallel. The voltage across 168 00:12:39,519 --> 00:12:43,639 any branch in a parallel is equal to the voltage at the across the other 169 00:12:43,679 --> 00:12:48,960 branches, and also equal to the total voltage. So like the current in 170 00:12:50,039 --> 00:12:56,320 the series, the voltage in the parallel is exactly the same at all points. 171 00:12:56,960 --> 00:12:58,679 So the first load, it's one hundred and twenty volts, it's the 172 00:12:58,720 --> 00:13:01,840 same, second load it's one hundred and twenty volts, it's the same, 173 00:13:03,240 --> 00:13:05,399 third load, it's one hundred and twenty volts at the same Why because it's 174 00:13:05,440 --> 00:13:09,919 tapping off Let's say in a parallel, it's tapping off that that circuit that's 175 00:13:09,919 --> 00:13:15,519 coming out, and since you're putting multiple connections to it, the voltage is 176 00:13:15,559 --> 00:13:20,039 going to be the same at all those points. Right now, the load 177 00:13:20,080 --> 00:13:24,679 itself can vary based on it's a hair dryer here or dishwasher here. I 178 00:13:24,720 --> 00:13:26,919 mean, you didn't get what I'm saying, right, not that they're on 179 00:13:26,960 --> 00:13:31,080 the same circuit. They're not. Come on, people, let's just use 180 00:13:31,279 --> 00:13:35,000 I'm just throwing your values here, Okay. Relax. I know that one 181 00:13:35,039 --> 00:13:37,399 guy out there can't wait to thumbs down it because he said, bull said 182 00:13:37,440 --> 00:13:41,799 dishwasher and a hair dryer. I'm just throwing loads, folks, Relax, 183 00:13:41,000 --> 00:13:46,679 Chill, calm down. So we have these various different you know, different 184 00:13:46,720 --> 00:13:52,799 loads, and they each have different AMP values obviously, okay, but the 185 00:13:52,840 --> 00:13:56,159 voltage is the same on that circuit. And then, of course the resistance 186 00:13:58,240 --> 00:14:03,000 is the is the last equation, and the resistance is the total resistance in 187 00:14:03,000 --> 00:14:07,799 a parallel circuit is found by applying Ohm's law to the total values of each 188 00:14:07,879 --> 00:14:16,360 load. Okay, So the total resistance is the e total E voltage okay, 189 00:14:16,399 --> 00:14:20,200 which in this case, the total E voltage was what one twenty at 190 00:14:20,200 --> 00:14:28,120 every point, divided by the total current, and that's the total current at 191 00:14:28,159 --> 00:14:33,000 each point added up, which is again adding all of the current because remember 192 00:14:33,120 --> 00:14:39,279 current is additive in a parallel circuit. Okay, so to find the total 193 00:14:39,320 --> 00:14:45,919 resistance, you're going to take the voltage divided by the total current. So 194 00:14:45,960 --> 00:14:48,720 why is that important? Because if we have some variables missing at any one 195 00:14:48,720 --> 00:14:52,600 of these loads, we're going to have to use owned law to find out 196 00:14:52,000 --> 00:14:58,600 the values at any given point. Let me give you an example. I 197 00:14:58,720 --> 00:15:01,120 have one of this thing. I have three different loads that are installed in 198 00:15:01,120 --> 00:15:05,919 parallel on a circuit, and the first load tells me the voltage and it 199 00:15:07,000 --> 00:15:11,399 tells me the OHMS, but it doesn't tell me the amps, which is 200 00:15:11,440 --> 00:15:15,120 I So this is where you got to remember what folks, Ohms law. 201 00:15:15,159 --> 00:15:18,840 That's what I'm saying. If you have not listened or have not listened to 202 00:15:18,879 --> 00:15:24,360 that one before, then that's important for you to do that. Okay. 203 00:15:24,440 --> 00:15:28,200 So if we're solving for, we're going to solve for in this case, 204 00:15:28,240 --> 00:15:31,519 we want to find the amps. Then the ampser what's missing. We have 205 00:15:31,679 --> 00:15:35,120 the voltage and we have the resistance. Then it's pretty easy to do, 206 00:15:35,200 --> 00:15:41,159 right Ohms law. It's one twenty divided into sixty. If that's what the 207 00:15:41,200 --> 00:15:43,519 resistance is in ohms, So it's one hundred and twenty. The first load 208 00:15:43,600 --> 00:15:48,000 is one hundred and twenty volts. Obviously it's parallel. That's the source voltage. 209 00:15:48,559 --> 00:15:52,240 And then it's sixty ohms of resistance, and we're trying to find what 210 00:15:52,279 --> 00:15:56,200 the amps are at that one point. Well, then you're using simple owms 211 00:15:56,279 --> 00:16:00,279 law. One hundred and twenty divided into sixty. It's two amps. That's 212 00:16:00,320 --> 00:16:03,039 with them. So now we have all the variables. We have the voltage, 213 00:16:03,519 --> 00:16:07,159 we have the amps, and we have the ohms. Makes sense. 214 00:16:08,759 --> 00:16:15,559 So the first thing to remember in all that is that's how simple it is 215 00:16:15,600 --> 00:16:21,879 to try to remember that series current remains the same at all points, and 216 00:16:22,200 --> 00:16:29,039 the voltage and the resistance or summation or additive when in parallel, it's different. 217 00:16:29,679 --> 00:16:37,360 In paralleling the current the amps is additive, but the voltage remains the 218 00:16:37,399 --> 00:16:45,039 same at all points, right, and then the total resistance is the total 219 00:16:45,120 --> 00:16:52,120 voltage divided by the total ampiers, and that gives you the total resistance. 220 00:16:52,480 --> 00:16:59,120 Okay, so if I had to let's see here, if I had to 221 00:16:59,159 --> 00:17:03,680 do anything, here, a couple other tips that will give you is in 222 00:17:03,720 --> 00:17:10,000 a parallel the total resistance is always less than the resistance of any two branches. 223 00:17:10,720 --> 00:17:14,720 Okay, the total resistance is going to be the less any two branches. 224 00:17:14,799 --> 00:17:19,559 So give you an example of that. Let's see here, If there's 225 00:17:19,599 --> 00:17:23,160 a branch circuit that has the same resistance, then each will draw the same 226 00:17:23,279 --> 00:17:27,640 current. If the branches are in parallel have different resistance, then each will 227 00:17:27,720 --> 00:17:32,759 draw a different current. Makes sense. We just showed that in each series 228 00:17:32,799 --> 00:17:37,599 of parallel circuit, the larger the resistance, the smaller the current draw. 229 00:17:37,880 --> 00:17:41,759 Okay, So the larger the resistance, the smaller the current. Okay, 230 00:17:41,960 --> 00:17:47,079 So let's kind of look at an example here. Let's say I have three 231 00:17:47,079 --> 00:17:48,599 different nodes and I'm just going to show you how you would add this up, 232 00:17:49,680 --> 00:17:55,160 and the three different load points on a parallel circuit. The first one 233 00:17:55,200 --> 00:17:59,440 is one hundred and twenty volts, it's two amps, and it's sixty oms. 234 00:18:00,160 --> 00:18:03,839 The second resistant point, obviously the voltage is going to be the same. 235 00:18:03,920 --> 00:18:07,799 We saw that. That's one hundred and twenty volts and the resist in 236 00:18:07,880 --> 00:18:11,440 the amps are one point five amps at this location, and the resistance is 237 00:18:11,480 --> 00:18:18,160 eighty the third location, again the voltage is be one twenty, the amps 238 00:18:18,200 --> 00:18:22,960 are one am, and the resistant is one hundred and twenty ohms. Okay, 239 00:18:22,680 --> 00:18:26,039 so in solving this on an exam, this would be easy because you're 240 00:18:26,079 --> 00:18:30,519 given everything. Okay, I would leave out something on an exam, So 241 00:18:30,559 --> 00:18:34,359 you have to do Olms law first to get these values, and you can 242 00:18:34,400 --> 00:18:38,599 do that pretty straightforward. We just did an example of the first resistant point 243 00:18:40,000 --> 00:18:44,559 or first to load point. But here what do we do? So if 244 00:18:44,599 --> 00:18:49,880 I ask you the question and says what is the voltage at the source or 245 00:18:49,920 --> 00:18:55,920 what is the voltage point each point of the load in a parallel circuit, 246 00:18:55,920 --> 00:18:59,359 then it's easy. It's one hundred and twenty volts. If I ask you 247 00:18:59,440 --> 00:19:03,680 what the total current is, Remember it's at parallel, so they're additive. 248 00:19:04,240 --> 00:19:08,079 So that was two at the first one, plus one point five at the 249 00:19:08,119 --> 00:19:12,480 second one and one at the third, So it's full point five amps total 250 00:19:12,880 --> 00:19:18,319 for this parallel circuit. And then when it came to the ohms, you're 251 00:19:18,359 --> 00:19:22,000 like, okay, well, what how do you calculate the ohms? Well, 252 00:19:22,039 --> 00:19:27,519 the OHMS is the total of the voltage which was one twenty divided by 253 00:19:27,599 --> 00:19:32,680 the total current which was four point five. So This one's pretty simple. 254 00:19:32,680 --> 00:19:36,920 One hundred and twenty divided by four point five, and that gives me twenty 255 00:19:36,960 --> 00:19:40,759 six point sixty six ohms of resistance, So that is the total. Now 256 00:19:40,799 --> 00:19:45,400 interesting, did you notice that the twenty six ohms was less than any of 257 00:19:45,440 --> 00:19:49,559 the resistors of the resistance totals in each one of the different loads. Remember 258 00:19:49,559 --> 00:19:52,960 the first one was sixty ohms, the second one was eighty oms, and 259 00:19:52,039 --> 00:19:56,519 the third one was one hundred and twenty ohms, and our total resistance is 260 00:19:56,559 --> 00:20:00,759 only twenty six point two sixty six ohms, So it is less than any 261 00:20:00,799 --> 00:20:04,920 one of those. Okay, So that's kind of important to remember on an 262 00:20:04,960 --> 00:20:11,599 exam when you're doing you see in examples, and that's why it says that 263 00:20:11,920 --> 00:20:17,920 again in a parallel the total resistance is always less than the resistance of any 264 00:20:17,920 --> 00:20:22,160 branch, so that twenty six point sixty six is less than sixty eighty or 265 00:20:22,200 --> 00:20:26,359 one twenty. So on an exam, you could probably be given four different 266 00:20:26,400 --> 00:20:30,720 loads, and you want to make sure that you're using the You're going to 267 00:20:30,759 --> 00:20:33,640 make sure that the one is going to be below sixty eighty or one twenty. 268 00:20:33,720 --> 00:20:36,000 So if any of those are the answers, you already ruled those out 269 00:20:36,079 --> 00:20:38,519 because you know that it's going to be less than any one of the resistance 270 00:20:38,759 --> 00:20:45,440 of any one of the other branches or any other load. So that's one 271 00:20:45,480 --> 00:20:51,880 little tip to remember when it comes to the parallel Okay, okay, So 272 00:20:52,799 --> 00:20:59,519 let's talk about total resistance again and break this down so we can see every 273 00:20:59,559 --> 00:21:03,359 little piece some every little formula that we might have. So if I want 274 00:21:03,400 --> 00:21:07,599 to determine the total resistance in a parallel circuit when the total current and the 275 00:21:07,640 --> 00:21:12,640 total voltage are unknown, right, so I have no idea what we're dealing 276 00:21:12,680 --> 00:21:15,559 with, all they give me is resistance. So you could get this on 277 00:21:15,599 --> 00:21:21,440 an exam where they draw you out three different resistors and they give you this, 278 00:21:21,480 --> 00:21:23,880 one is sixty oms, one's eighty oms, and one's one twenty and 279 00:21:23,920 --> 00:21:27,039 you're like, Okay, the hell am I trying to solve for here? 280 00:21:27,119 --> 00:21:30,480 What are we trying to do? And it wants to know what the total 281 00:21:30,519 --> 00:21:37,200 resistance is? But that's all it gives you, right, Okay, Well, 282 00:21:37,279 --> 00:21:40,440 one of the ways that we can do this is if you look at 283 00:21:40,480 --> 00:21:45,240 it, then what did we say the one of the formula that you're going 284 00:21:45,319 --> 00:21:52,559 to do is you got the one over RT equals one divided by R one 285 00:21:52,599 --> 00:21:56,319 plus one divided by R two plus one divided by R three. So this 286 00:21:56,400 --> 00:21:59,640 is one of your formulas you can use, okay. So we have three 287 00:21:59,640 --> 00:22:03,000 different resistive loads here, so let's work this math. And this is an 288 00:22:03,039 --> 00:22:07,319 easier formula to remember when you draw it out, it's just one draw a 289 00:22:07,400 --> 00:22:11,039 line under the one and then put our t. That's the total. That's 290 00:22:11,079 --> 00:22:15,359 the RT total resistance and that equals to again one over R one plus one 291 00:22:15,480 --> 00:22:21,039 over R two plus one over R three. So that one over R one 292 00:22:21,279 --> 00:22:25,559 is a process that you've got to work. That is some division that you've 293 00:22:25,599 --> 00:22:29,480 got to work. Okay, So let's make sure we know how we're doing 294 00:22:29,519 --> 00:22:30,920 this. So once you write that down, so what did we have? 295 00:22:32,359 --> 00:22:34,519 We have three different loads. We have a sixty and eighty and on one 296 00:22:34,640 --> 00:22:38,000 twenty. So the first one to be one over sixty because that's your R 297 00:22:38,079 --> 00:22:45,759 one plus one over plus one over eighty plus one over one twenty. So 298 00:22:45,759 --> 00:22:52,279 I'm gonna do one, okay, and just kind of work it out and 299 00:22:52,319 --> 00:22:57,000 see what we what we've got in total and work our math. Okay. 300 00:22:57,240 --> 00:23:00,039 Right. The first thing that we're going to need to do is we're gonna 301 00:23:00,079 --> 00:23:03,880 have to lay out our formula. Okay, so remember what I said, 302 00:23:03,920 --> 00:23:07,799 Earliert, it's going to get your pencils if you have them. One over 303 00:23:07,920 --> 00:23:14,599 our t equals one over sixty. That was our first resistive load. Plus 304 00:23:14,680 --> 00:23:18,599 one over eighty which was our second resistive load eighty oms, and then plus 305 00:23:18,640 --> 00:23:22,359 one over one twenty which is our third resistive load. Okay, so that's 306 00:23:22,400 --> 00:23:25,400 our three loads. Remember our question wants to know with the total resistance. 307 00:23:25,400 --> 00:23:27,920 But we weren't given any voltage. We weren't given any anything else. This 308 00:23:29,039 --> 00:23:30,680 is all we were given. Okay, no current, this is it. 309 00:23:32,519 --> 00:23:34,559 So the first thing we got to do is draw. When you draw that 310 00:23:34,599 --> 00:23:40,680 out, and so we're gonna go. Okay. One of the easiest way 311 00:23:40,680 --> 00:23:42,319 to do this is to go to the highest number, which is one hundred 312 00:23:42,359 --> 00:23:48,240 and twenty oms. You need to find out what is the lowest common denominator 313 00:23:48,319 --> 00:23:51,839 amongst the sixty eighty and the one twenty. Well, the easiest thing to 314 00:23:51,839 --> 00:23:53,640 do is go do the largest one first, and that is the one twenty, 315 00:23:55,400 --> 00:23:59,519 and just do it one twenty plus one twenty because that's the next one. 316 00:23:59,640 --> 00:24:03,880 Be two right now, since we know eighty won't go into one twenty, 317 00:24:03,960 --> 00:24:07,519 so that one twenty can't be the lowest denominator, and sixty does go 318 00:24:07,559 --> 00:24:15,799 into one twenty, right, sixty plus sixty is one twenty, but eighty 319 00:24:15,799 --> 00:24:21,519 plus eighty is not okay, that would be one sixty, so that can't 320 00:24:21,559 --> 00:24:26,160 work right because then plus another one would be higher. So one twenty is 321 00:24:26,200 --> 00:24:30,680 not the lowest denominator. So we went up into forty. So I always 322 00:24:30,720 --> 00:24:34,440 go to the largest resistant, the largest number, and then do it times 323 00:24:34,440 --> 00:24:38,160 itself or plus itself. Excuse me to find out what the next one would 324 00:24:38,160 --> 00:24:42,359 be and then see if the others will will work into that and how many 325 00:24:42,400 --> 00:24:45,880 it takes to get to that. Right, So since two forty is what 326 00:24:45,920 --> 00:24:48,759 we'd be working on, we'll go to the first one to sixty. So 327 00:24:48,799 --> 00:24:53,000 we'll go too forty divided by sixty, and we see that it goes into 328 00:24:53,079 --> 00:24:57,480 it four times, so you write that down four. The next one is 329 00:24:57,519 --> 00:25:02,079 the eighty, so I'm gonna go to two two forty divided by eighty, 330 00:25:02,480 --> 00:25:04,440 and we see that that goes into exactly three, so I'm gonna write that 331 00:25:04,440 --> 00:25:10,160 down three. And of course the one twenty one. We knows twice to 332 00:25:10,200 --> 00:25:12,279 get two forty, so that would be a two. So you add those 333 00:25:12,359 --> 00:25:17,119 up, so that's four by six, seven eighty nine. Okay. So 334 00:25:17,720 --> 00:25:22,839 underneath the bottom is your lowest common denominator. So we're rewriting this formula now, 335 00:25:22,519 --> 00:25:26,000 and the lowest common denominator is two hundred and forty, so it's going 336 00:25:26,079 --> 00:25:32,720 to be nine over two forty. So that's our new equation, nine over 337 00:25:32,759 --> 00:25:37,759 two forty. And now what you do is you do what's called cross multiplication. 338 00:25:38,359 --> 00:25:44,279 So you have the one over rt and then you had the nine over 339 00:25:44,319 --> 00:25:47,880 two forty, which is what we just worked out, and so you do 340 00:25:47,920 --> 00:25:52,599 the cross mopplication. So one is gonna do what one times two forty. 341 00:25:52,720 --> 00:25:59,559 So now the two forty goes on the top, and since the the two 342 00:25:59,720 --> 00:26:04,079 forty now goes to the top, the nine goes to the bottom. And 343 00:26:04,160 --> 00:26:10,880 you just simply multiple divide the two forty divided by nine, and that is 344 00:26:10,920 --> 00:26:15,920 twenty six point sixty six homes. Okay. So assummation of that is again, 345 00:26:17,119 --> 00:26:21,000 once you know each of the resistant loads, then it's one over one 346 00:26:21,039 --> 00:26:23,839 over sixty plus one over eighty plus one over twenty. Find the common lowest 347 00:26:23,839 --> 00:26:30,200 denominator in this case was two forty, and then it's how many sixties went 348 00:26:30,279 --> 00:26:33,440 in to get to forty, so that was on the top. That one 349 00:26:33,519 --> 00:26:37,720 is replaced with four, and then how many eighties does it take to go 350 00:26:37,799 --> 00:26:41,279 into two forty three, So that goes on the top and replaces the one. 351 00:26:41,799 --> 00:26:45,519 And then how many how many one twenties went into two forty? Well 352 00:26:45,559 --> 00:26:48,519 two, so that replaces the one. So your new formula looks like one 353 00:26:48,680 --> 00:26:56,039 over rt equals four plus three plus two over two forty because two forty was 354 00:26:56,079 --> 00:27:00,359 the lowest commis common denominator. And then really what you do is you you 355 00:27:00,400 --> 00:27:04,640 can cross multiply, but really in this case, you just flip it and 356 00:27:04,680 --> 00:27:10,960 then it's just two forty divided into nine, and that is twenty six point 357 00:27:11,000 --> 00:27:15,640 sixty six, and that was your oms of resistance. And as we said 358 00:27:15,720 --> 00:27:19,119 earlier, you will notice that the twenty six point sixty six is less than 359 00:27:19,240 --> 00:27:26,599 any one of the actual resistance values that we have. We had a sixty 360 00:27:26,720 --> 00:27:29,440 eighty and one twenty any obviously, the twenty six point sixty six, like 361 00:27:29,440 --> 00:27:32,279 we did before, is less than any of those. So that what might 362 00:27:32,319 --> 00:27:36,960 be a trigger for you on an exam. Okay, all right, So 363 00:27:37,359 --> 00:27:41,720 one of the other things that I like to throw out is what if you 364 00:27:41,839 --> 00:27:47,279 have an equation and we're talking parallels here where all of the resistance or all 365 00:27:47,319 --> 00:27:52,519 of the loads that are installed in parallel are exactly the same. Right, 366 00:27:52,880 --> 00:27:57,119 So what if we had an example where you have three resistant three loads, 367 00:27:57,200 --> 00:28:03,359 the resistance value is one twenty one twenty. Well, that's easy because what 368 00:28:03,400 --> 00:28:07,240 you do is if it's that's the case, then how to find the total 369 00:28:07,279 --> 00:28:14,960 resistance is to do the resistance. Okay, and remember what we said about 370 00:28:15,119 --> 00:28:21,720 parallels when it came to resistance. You remember when we're a total resistance Okay, 371 00:28:21,880 --> 00:28:25,279 so we're taking the resistance. What is the resistance in the equation? 372 00:28:26,880 --> 00:28:30,599 Our t equals are over in, so we take since they're all the same, 373 00:28:32,359 --> 00:28:34,640 we take any one value in resistance, so that we'd take the one 374 00:28:34,680 --> 00:28:40,440 twenty and we divide it by the number of resistors that we have or loads 375 00:28:40,440 --> 00:28:42,400 that we have. And this was case was three. So it's simply one 376 00:28:42,519 --> 00:28:48,079 twenty divided by three, and so the total resistance for three one hundred and 377 00:28:48,119 --> 00:28:56,519 twenty home loads in a parallel is forty ohms. Now again, that that 378 00:28:56,640 --> 00:29:02,599 seems like it would blow people's mind, but it isn't when it comes to 379 00:29:02,759 --> 00:29:07,359 parallels, and it's different. Right when we talked about series in our previous 380 00:29:07,400 --> 00:29:14,079 podcast, it's people are like, well, the resistance is what RT equals 381 00:29:14,200 --> 00:29:15,839 the sum of our one plus R two plus R three. But that's not 382 00:29:15,880 --> 00:29:18,200 how it goes here. You don't go one twenty plus one twenty plus one 383 00:29:18,240 --> 00:29:22,480 twenty. No, they're paralleled out. So that's why we use the formula. 384 00:29:22,640 --> 00:29:29,319 RT equals are over in and the end being the number of resistors if 385 00:29:29,319 --> 00:29:32,720 they're all the same. So if you get a question and they're all the 386 00:29:32,839 --> 00:29:36,240 same exact resistance and they want to know what the total resistance is and it 387 00:29:36,279 --> 00:29:38,359 doesn't matter. They're not giving you voltage, they're not giving you amps. 388 00:29:38,359 --> 00:29:41,680 Who cares. That's not what the question would be asking you. It just 389 00:29:41,680 --> 00:29:45,640 wants what's a total resistance? So you can still calculate that out since they're 390 00:29:45,680 --> 00:29:49,319 all the same. You just take the one twenty, divide it by three, 391 00:29:51,079 --> 00:29:55,319 and that's forty one. So that is your total resistance for the entire 392 00:29:55,400 --> 00:29:59,119 circuit. Yes, it's one hundred and twenty at each load, but it 393 00:29:59,200 --> 00:30:06,240 is forty one of total resistance. Okay, all right, So one of 394 00:30:06,279 --> 00:30:10,200 the common common questions on an exam is they want to know what the total 395 00:30:10,240 --> 00:30:14,440 resistance is, and it's just giving you the resistance, and they give you 396 00:30:14,480 --> 00:30:18,400 two values in a parallel So think of this as two straight lines and then 397 00:30:18,880 --> 00:30:26,880 two perpendicular loads running between them. And both of these loads are one is 398 00:30:26,000 --> 00:30:30,039 forty homes and one is is eighty homes. Okay, So again, if 399 00:30:30,079 --> 00:30:33,759 this was the same two they bothe for eighty, then that's easy, right, 400 00:30:33,799 --> 00:30:37,680 You just eighty divided by two and forty homes. Right, But it's 401 00:30:37,720 --> 00:30:41,000 not the same, okay when it comes to this because the loads are different. 402 00:30:41,160 --> 00:30:45,160 One is forty oms, one is eighty homes. So there's a formula 403 00:30:45,279 --> 00:30:48,480 that you use for this, and I'm going to tell you the formula. 404 00:30:48,599 --> 00:30:52,319 You can pause and write this down or come back to this episode. It's 405 00:30:52,440 --> 00:30:56,799 right at about thirty minutes and fifty four seconds into the episode. Is it's 406 00:30:57,079 --> 00:31:04,079 R one times R two divided by R one plus R two. Really simple, 407 00:31:04,880 --> 00:31:07,880 and all you do is work the two. So the first one, 408 00:31:07,920 --> 00:31:10,640 so if if one of the loads was forty ohms and one was eighty homes, 409 00:31:10,720 --> 00:31:12,799 let's work the top first, R one, let's say, is the 410 00:31:12,839 --> 00:31:18,519 forty ohms and R two is the eighty simple, so it's forty times eighty, 411 00:31:18,920 --> 00:31:22,039 and that's your top value. That would be three thy two hundred. 412 00:31:22,000 --> 00:31:27,079 The bottom one is R one plus R two, So think of this multiplication 413 00:31:27,240 --> 00:31:33,799 first and then addition. Okay, so then it would be forty plus eighty, 414 00:31:33,319 --> 00:31:38,079 and that is one twenty. So it's simply thirty two hundred divided by 415 00:31:38,160 --> 00:31:44,480 one twenty. So thirty two hundred divided by one twenty twenty six point sixty 416 00:31:44,519 --> 00:31:48,319 six oms, and that is your total resistance. And guess what you noticed. 417 00:31:49,319 --> 00:31:52,920 It is still less than any of the resistors here, any of the 418 00:31:52,960 --> 00:31:56,440 resistance loads here. The lowest one was forty. It's less than that. 419 00:31:56,799 --> 00:32:00,240 It's twenty six point sixty six. So this helps you, if you're an 420 00:32:00,240 --> 00:32:05,559 exam taker, to narrow out some of the obvious ones that are not going 421 00:32:05,640 --> 00:32:07,839 to be the answer. So even if you can't figure it out, you 422 00:32:07,839 --> 00:32:13,680 could probably use a process of elimination and get you down to the best possible 423 00:32:13,720 --> 00:32:17,759 answer. Okay, okay, Before I leave this episode, I do want 424 00:32:17,799 --> 00:32:22,480 to show you another way that we do this. When you have multiple parallel 425 00:32:22,480 --> 00:32:24,960 circuits. And I showed you the way to do it earlier with a common 426 00:32:25,000 --> 00:32:29,920 denominator. There's another way to do this, and I want to show you 427 00:32:29,960 --> 00:32:34,160 this one, So bear with me using that exactly the same formula, because 428 00:32:34,200 --> 00:32:37,920 you can choose what you want. I showed you the shorter method to utilize, 429 00:32:37,000 --> 00:32:39,680 but I'm going to show you the same method to do it. It's 430 00:32:39,680 --> 00:32:43,720 this is gonna be a little longer one, okay. So remember that formula 431 00:32:43,759 --> 00:32:49,440 that I used earlier. One over rt equals one over R one plus one 432 00:32:49,519 --> 00:32:53,839 over R two plus one over R three. You with me, okay, 433 00:32:54,119 --> 00:32:59,240 So in how we do this, One of the ways that you can do 434 00:32:59,319 --> 00:33:02,079 this is to work it out. So remember what we said those three loads 435 00:33:02,119 --> 00:33:07,240 were or resistance was sixty eighty and one twenty. So let's solve each one 436 00:33:07,319 --> 00:33:09,200 so that one would be the first one would be one over sixty, right, 437 00:33:10,240 --> 00:33:13,759 So let's work that one real quick and write it down. And again, 438 00:33:13,839 --> 00:33:16,519 if you're using this method, you want to write down every decimal point, 439 00:33:16,519 --> 00:33:20,920 I mean every space after the decimal point. So let's do one divided 440 00:33:20,960 --> 00:33:24,200 by sixty and that is Wow. They give you a lot of decimal points. 441 00:33:24,279 --> 00:33:30,519 So The first one is zero point zero one six six six six six 442 00:33:30,839 --> 00:33:36,359 six six, So for your math folks, that's one two three four five 443 00:33:36,440 --> 00:33:42,319 six seven sixes. Okay. So it's point zero one and then seven sixes. 444 00:33:42,400 --> 00:33:45,039 Okay, just trust me, you're going to have to use the entire 445 00:33:45,240 --> 00:33:47,599 value in order to get it close to the version that we did earlier, 446 00:33:47,680 --> 00:33:52,160 which was the common denominator version. All right. So the next one was 447 00:33:52,640 --> 00:33:57,519 one over what well, the next one was one over eighty okay, so 448 00:33:57,599 --> 00:34:00,440 let's do that one. So let's do one divided by eight, and that 449 00:34:00,680 --> 00:34:05,680 is zero point zero, one two five and okay, that one is easy, 450 00:34:05,720 --> 00:34:08,519 only four decimal points. Good our earth places, all right. So 451 00:34:08,559 --> 00:34:12,639 the next one is one twenty, so we do one over one twenty, 452 00:34:13,880 --> 00:34:16,199 and that one has quite a few spots. Okay, let's do this again, 453 00:34:16,239 --> 00:34:20,639 one divided by one twenty. Okay, So we write that down zero 454 00:34:20,840 --> 00:34:27,159 point zero zero eight three three three three three three, So there is one 455 00:34:27,239 --> 00:34:31,000 two, three four five six threes. So it's point zero zero eight and 456 00:34:31,039 --> 00:34:35,480 then followed by six threes. Okay. These are the total numbers, and 457 00:34:35,480 --> 00:34:37,639 I'm going to show you why you would do this. Now. Typically we 458 00:34:37,679 --> 00:34:40,679 would go to four spaces, and it's not going to equal the same as 459 00:34:40,679 --> 00:34:44,639 the denominator value. But I just want to show you how we could do 460 00:34:44,679 --> 00:34:47,400 it this way, all right, So now what you do is you add 461 00:34:47,519 --> 00:34:52,559 up all of the denominators that's across the bottom right, So that is the 462 00:34:52,679 --> 00:34:55,840 point zero one six six six six six six six six six. So I'm 463 00:34:55,840 --> 00:35:00,719 gonna do it here. So it's point zero one sixty six six sixty six 464 00:35:00,840 --> 00:35:09,599 sixty six plus point zero one two five plus point zero zero eight three three 465 00:35:09,760 --> 00:35:16,079 three three three three, and that gives me a total of zero point zero 466 00:35:16,199 --> 00:35:22,000 three seven four nine nine nine nine nine. Okay, so that is point 467 00:35:22,159 --> 00:35:29,519 zero three seven four and then followed by five nines. Now I'm gonna divide 468 00:35:29,559 --> 00:35:32,360 one into that, so we get back to the formula. So it's one 469 00:35:32,519 --> 00:35:36,960 over this value number. So I'm gonna do I'm gonna finish it out. 470 00:35:37,000 --> 00:35:43,639 I'm gonna one divide it by point zero three seven four nine nine, nine 471 00:35:43,760 --> 00:35:47,719 nine nine, and that gives me twenty six point six six six sixty six. 472 00:35:47,800 --> 00:35:52,360 So we can use twenty six point sixty six. So in order to 473 00:35:52,480 --> 00:35:57,400 make it match the denominator of the way I did it, earlier. You 474 00:35:57,480 --> 00:36:00,599 have to use all of the values. Reason I'm bringing this up is because 475 00:36:00,719 --> 00:36:02,840 you'll have people out there that say, well, you only have to go 476 00:36:02,920 --> 00:36:07,719 to the four spaces, and that's true, but that won't match the denominator 477 00:36:07,800 --> 00:36:10,199 value. And for the end of the day, for the real world, 478 00:36:10,280 --> 00:36:14,280 it's fine. Four spaces should be more than enough to find out what the 479 00:36:14,280 --> 00:36:16,199 resistance is. But if you want to get it exact, then you use 480 00:36:16,360 --> 00:36:21,000 all of the values from your calculator. Okay, and that's what we did. 481 00:36:22,280 --> 00:36:27,199 Ultimately, if I had done it to the four spaces, then it 482 00:36:27,239 --> 00:36:30,000 would have been slightly different. It wouldn't have matched the one we did earlier 483 00:36:30,039 --> 00:36:34,440 at twenty six point sixty six. It would have been more like twenty six 484 00:36:34,519 --> 00:36:38,239 point seven or whatever. It's close enough, okay, but I just wanted 485 00:36:38,280 --> 00:36:43,239 you to see the difference. You can certainly use this formula to do like 486 00:36:43,320 --> 00:36:46,119 I did and work it all the way out, or you can do the 487 00:36:46,199 --> 00:36:50,800 version we did earlier, which is the common denominator version. Hey, it's 488 00:36:50,840 --> 00:36:54,760 whichever version that you feel you feel comfortable with. And maybe you have a 489 00:36:54,800 --> 00:37:00,639 situation where it's you can't figure out what the common denominator is. And I 490 00:37:00,719 --> 00:37:02,440 kind of gave you tips on how to start out, take the larger value 491 00:37:02,480 --> 00:37:06,119 and use that one and then see if the others will work into it. 492 00:37:07,360 --> 00:37:09,039 But if not, you can do it this long method. It just takes 493 00:37:09,079 --> 00:37:14,079 a little longer. But either way, that's examples of how you can find 494 00:37:14,079 --> 00:37:17,280 the total resistance when they don't give you the voltage, when they don't give 495 00:37:17,320 --> 00:37:21,480 you the amps, and this is all they give you. All they give 496 00:37:21,519 --> 00:37:23,760 you is the resistance. Okay, So hopefully that helps you out in case 497 00:37:23,800 --> 00:37:27,760 you get one of those type of questions on an exam. Okay, all 498 00:37:27,840 --> 00:37:30,119 right, folks, that's it. Hopefully you got something out of the day's 499 00:37:30,119 --> 00:37:34,519 episode. We're going to do another episode, the last one in this series 500 00:37:35,039 --> 00:37:37,719 of Let's Ask Paul's dealing with series parallels. We're going to do a quick 501 00:37:37,760 --> 00:37:42,280 one on combinations to show you how you work from a series down to a 502 00:37:42,320 --> 00:37:46,119 parallel excuse me, from a parallel down to a series and because the series 503 00:37:46,119 --> 00:37:50,039 are easier to work, and that's what we're going to cover in the next 504 00:37:50,039 --> 00:37:52,960 episode. Okay, all right, again, these can't get complicated. If 505 00:37:53,000 --> 00:37:55,880 you want to watch a video on it, then you get a subscription to 506 00:37:55,920 --> 00:38:00,199 our fast Tracks Tube. We have videos on it that shows examples on the 507 00:38:00,199 --> 00:38:02,400 screen. We even have a video where you sit in on us on a 508 00:38:02,440 --> 00:38:07,400 Wednesday night where I talk about these things and it might help you. Again, 509 00:38:07,639 --> 00:38:09,639 probably on an exam, you might only have one question, one or 510 00:38:09,639 --> 00:38:14,559 two questions, so I wouldn't you know, I wouldn't die on this sword. 511 00:38:15,079 --> 00:38:17,719 But it's important that you understand these basic concepts. Okay, all right, 512 00:38:19,000 --> 00:38:21,960 remember this episode, folks. I believe it's one seventy three. I'm 513 00:38:22,000 --> 00:38:23,280 not sure it, don't hold me to it. If you have any questions, 514 00:38:23,280 --> 00:38:27,920 you can always go to Paul Abernathy dot com and submit a comment. 515 00:38:28,480 --> 00:38:31,400 Ask a question based on an episode. Just be very detailed in your question 516 00:38:31,480 --> 00:38:35,559 because I'm not going to go back and listen to the episode to be able 517 00:38:35,559 --> 00:38:37,760 to answer your question. Okay, I don't have the time for that. 518 00:38:37,039 --> 00:39:07,880 Till next time, folks, Stay safe, God bless nothing, mask nothing