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Unformatted text preview: Quiz 2A DL Sec Grading: Last 6 digit of student ID: Name: First three letters of your family name 1. The circuit to the right contains several light bulbs (resistors), some of which have their resistances shown. The battery voltage is 30 V. What is the voltage difference ∆ V from point A to B ( ∆ V = V B V A )? Make sure you include the proper sign and show all work. First, find R eq for R 1 and R 2 , 1 R eq = 1 R1 1 R2 1 R eq = 1 3 1 6 = 1 2 R eq = 2 We now have three resistors in series with a I=2A current. In order to find the voltage difference between A and B, we need to use the linear transport equation across the equivalent resistor. This gives: (there is no battery between A and B, so don't include it!) V Δ AB =− IR eq =− 2A ∗ 2 V Δ AB =− 4V 10.0 I Correct work and calculated 4V 9.5 D Minor math mistake (usually a sign error; getting 4V) 8.5 K All good, but had a minor logic error (ieincluded the battery; getting 26V) 8.0 M Found R...
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 Spring '08
 MAHMUD
 Resistance, Light, Resistor, Electrical resistance, 6 digit, battery voltage

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