Ch 18 HW 4

# Ch 18 HW 4 - Ch 18 HW 4 S2009(Homework Current Score 31/31...

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Ch 18 HW 4 S2009 (Homework) Current Score: 31/31 Due: Wednesday, March 11, 2009 01:00 PM EDT About this Assignment Extension Requests Question Points 1 2 3 10 14 7 Total 31/31 Description Energy conservation and charge conservation in circuits (includes parallel circuits). Instructions Reading: Sec. 18.7-18.9 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. 10/10 points All Submissions Notes Question: MI2 18.P.57 Question part Points Submissions 1 2 3 4 5 6 1 2 2 2 2 1 3/3 1/3 1/3 1/3 1/3 1/3 Total 10/10 A circuit is constructed from two batteries and two wires, as shown in the diagram below.

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Each battery has an emf of 1.6 volts. Each wire is 27 cm long, and has a diameter of 0.0007 meters. The wires are made of a metal which has 7e+28 mobile electrons per cubic meter; the electron mobility is 2e-05 (m/s)/(V/m). A steady current runs through the circuit. The locations marked by "x" and labeled by a letter are in the interior of the wire. Which of these statements about the electric field in the interior of the wires, at the locations marked by "x"s, are true? Check all that apply. At every marked location the magnitude of the electric field is the same. The magnitude of the electric field at location D is larger than the magnitude of the electric field at location C . At location B the electric field points to the left . Which of the following equations is a correct energy conservation (round-trip potential difference) equation for this circuit, along a round trip path starting at the negative end of battery #1 and traveling counterclockwise through the circuit (that is, traveling to the left through the battery, and continuing on around the circuit in the same direction)? + 1.6
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## This note was uploaded on 02/13/2010 for the course PY PY208 taught by Professor Kohlmyer during the Spring '09 term at N.C. A&T.

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Ch 18 HW 4 - Ch 18 HW 4 S2009(Homework Current Score 31/31...

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