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# Ch20 HW3 - Ch20 HW3 F2010 9:25 PM Stefan Coreth PY 208...

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12/17/10 9:25 PM Ch20 HW3 F2010 Page 1 of 3 http://www.webassign.net/[email protected]/[email protected] Current Score : 20 / 22 Due : Friday, October 22, 2010 11:24 AM EDT 1. 14/14 points Question: MI3 20.3.P.084 Three bulbs A circuit is made of two 1.4 volt batteries and three light bulbs as shown in the figure. When the switch is closed and the bulbs are glowing, bulb 1 has a resistance of 11 ohms, bulb 2 has a resistance of 36 ohms, bulb 3 has a resistance of 26 ohms, and the copper connecting wires have negligible resistance. You can also neglect the internal resistance of the batteries. (a) With the switch open, indicate the approximate surface charge on the circuit diagram.(Do this on paper. Your instructor may ask you to turn in this work.) Refer to your diagram to decide which of the following statements about the circuit (with the switch open) are true: (b) With the switch open, find these potential differences: V B - V C = 2.8 2.8 V V D - V K = 0 0 V Ch20 HW3 F2010 (Homework) Stefan Coreth PY 208, section 002M, Fall 2010 Instructor: Laura I. Clarke Web

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