s04_concept

s04_concept - Node Method Concept Test R 2 R 4 R 5 R 3 I V...

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Unformatted text preview: Node Method Concept Test R 2 R 4 R 5 R 3 I V e 1 e 2 _ + For the network above, find the equation that expresses Kirchhoffs Current Law at the node e 2 . My answer was 1. ( R 4 + R 5 ) e 2 R 4 e 1 = I 2. ( G 4 + G 5 ) e 2 G 4 e 1 = I 3. ( G 4 + G 5 ) e 2 G 4 e 1 = I 4. Not among the answers above 5. I was unable to get an answer Node Method Solution 5 10 15 20 25 30 35 40 1 2 3 4 5 Number of Students Answer Lecture S4: Node Method 10 20 30 40 50 60 1 2 3 4 5 Number of Students Answer Lecture S4: Node Method The correct answer is #3. The current owing out of the node through R 4 is ( e 2 e 1 ) /R 4 = G 4 ( e 2 e 1 ) . The current owing out of the node through R 5 is ( e 2 0) /R 5 = G 5 e 2 . The current owing out of the node through the current source is I , because the source points into the node. So ( G 4 + G 5 ) e 2 G 4 e 1 I = 0 The class did significantly better on the second try, when I asked everyone to find someone who disagrees...
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s04_concept - Node Method Concept Test R 2 R 4 R 5 R 3 I V...

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