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Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 Problem 14 Problem 15 Problem 16 Problem 17 Problem 18 Problem 19 Problem 20 Problem 21 Problem 22 Problem 23 Problem 24 Problem 25 Problem 26 Problem 27 Problem 28 Problem 29 Problem 30 Problem 31 Problem 32 Problem 33 Problem 34 Problem 35 Problem 36 Problem 37 Problem 38 Problem 39 Problem 40 Problem 41 Problem 42 Problem 43 Problem 44 Problem 45 Problem 46 Problem 47 Problem 48 Problem 49 Problem 50 Problem 51 Problem 52 Problem 53 Problem 54 Problem 55 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60 Problem 61 Problem 62 Problem 63 Problem 64 Problem 65 Problem 66 Problem 67 Problem 68 Problem 69 Problem 70 Problem 71 Problem 72 Problem 73 Problem 74 Problem 75 Problem 76 Problem 77 Problem 78 Problem 79

Problem 35 Hard Difficulty

Apply the junction rule at point a in Figure 21.55.

Answer

$I _ { 3 } = I _ { 2 } + I _ { 1 }$

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Physics 102 Electricity and Magnetism
College Physics for AP® Courses

Chapter 21

Circuits, Bioelectricity, and DC Instruments

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Problem 5
Problem 6
Problem 7
Problem 8
Problem 9
Problem 10
Problem 11
Problem 12
Problem 13
Problem 14
Problem 15
Problem 16
Problem 17
Problem 18
Problem 19
Problem 20
Problem 21
Problem 22
Problem 23
Problem 24
Problem 25
Problem 26
Problem 27
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Problem 32
Problem 33
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Problem 38
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Problem 41
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Problem 46
Problem 47
Problem 48
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Problem 51
Problem 52
Problem 53
Problem 54
Problem 55
Problem 56
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Problem 61
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Video Transcript

Hello. So for this problem were asked to apply the junction goal. We'll start off with what? The junction rule states basically states that first Pacific junction the sum of all the current going into equals the sum of all the current coming out of it. So for this specific problem, we're just gonna focus on Junction A at this intersection and the currents coming in and coming out of it, we don't have to worry about any of the batteries or the resisters. So we have. I want coming up I to going to the right, and I three going up as well. So when we apply the junction rule, but first gonna look at the sum of all the current going into junction A and in this case, it would be just by three, because that's the only current pointing towards a. So for the right side of the equation, we would have I won and I too, because they're both pointing away or out from the junction. And because this is the sum of all the current coming out of junction of the junction we're gonna add, I want and I to So the answer to this question would be I three equals I want plus I to

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