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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: (a-Answer) 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 (d-Answer) 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 (c-Answer) 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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