Fall 2005, Exam 2

# Fall 2005, Exam 2 - PHY 131 Name Signature Recitation...

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PHY 131 Name___________________________________ ASU ID _______________________ Signature________________________________ Recitation Section Time____________________ Recitation Instructor ________________ Write your answer in the space provided. SHOW YOUR WORK! [6 points each] 1) A 50 - W and a 100 - W light bulb are both designed to operate at 120 V. Which has the lower resistance? 1) 2) What voltage is needed to put 1.6 mC on a 100 - μF capacitor? 2) 3) A 12 - V car battery stores 2.8 MJ of energy. How much charge can move between the battery terminals before it is totally discharged? Assume the potential difference remains at 12 V, an assumption that is not realistic. 3) 1

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4) An electric charge distribution causes the equipotential lines that are shown in the figure. (a) Of the four labeled points, which is at the point where the electric field is stronger than the field strength at the others? (b) Show the direction of the electric field at the point you chose in part (a). 4)
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## This note was uploaded on 04/29/2008 for the course PHY 131 taught by Professor Fuchs during the Fall '07 term at ASU.

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Fall 2005, Exam 2 - PHY 131 Name Signature Recitation...

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