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Unformatted text preview: Solution for Homework 11 Beginning Circuits Solution to Homework Problem 11.1(Same in Series Combination) Problem: For a series combination of resistors, which of the following is the same for each resistor? Select One of the Following: (aAnswer) Current (b) Potential Difference (c) Electric Field (d) Power Dissipated Solution The current is the same through each resistor in a series combinations of resistors. Total Points for Problem: 1 Points Solution to Homework Problem 11.2(Parallel Resistors) Problem: The figure to the right shows a paral lel combination of resistors that is part of a larger circuit. Current I 1 = 2A flows through the top re sistor. Calculate I 2 , the current through the bottom resistor. Select One of the Following: (a) 1 / 2A (b) 1A (c) 2A (dAnswer) 4A (e) 8A a b I 1 I 2 4 2 Solution Applying Ohms law to the top resistor allows the calculation of the potential difference between a and b ,  V ab  = IR = (2A)(4) = 8V This is also the potential difference across the bottom resistor. The current through the bottom resistor is found by applying Ohms law, I 2 =  V ab  R = 8V 2 = 4A 1 Total Points for Problem: 3 Points Solution to Homework Problem 11.3(Light bulbs in Parallel) Problem: Examine the circuit at the right. When the switch is open, no current flows through bulb C . Assuming a perfect battery, when the switch is closed (a)Will the brightness of bulb C be greater than, less than, or about the same as the other bulbs after the switch is closed? Select One of the Following: (a) greater than (b) less than (cAnswer) about the same (b)Will the current provided by the battery be greater than, less than, or about the same af ter the switch is closed as the current provided by the battery before the switch was closed.?...
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 Spring '08
 Stewart
 Physics, Work

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