s07exam1_phys2

# s07exam1_phys2 - PHYS-1200 PHYSICS II EXAM 1 NAME There are...

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PHYS-1200 PHYSICS II EXAM 1 February 14, 2007 NAME ______________________________ There are 9 different pages in this quiz, including the cover page. Check now to see that you have all of them. CREDIT GRADE PART A 40% PART B 20% PART C-1 20% PART C-2 20% TOTAL 100% All work and answers must be given in the spaces provided on these pages.

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NAME ______________________________ PART A . (40%) Each question is worth 4%. In the space provided, to the left of the question number, write the letter corresponding to the best answer to the question. ___ 1. A positive charge Q is placed on a hollow conducting sphere of inner radius R 1 and outer radius R 2 . A particle with charge q is placed at the center of the cavity in the sphere, as shown in the sketch. The magnitude of the electric field at a distance r from the center ( r > R 2 ) is: A. zero B. 2 1 0 4 R Q πε C. 2 0 4 r q πε D. 2 0 4 ) ( r Q q πε + E. ) ( 4 ) ( 2 2 1 0 r R Q q - + πε ___ 2. A battery is connected across a series combination of two identical resistors. If the potential difference between the terminals of the battery is V , and the current through the battery is i , then which of the following is true: A. the potential difference across each resistor is V and the current through each resistor is i B. the potential difference across each resistor is V /2 and the current through each resistor is i /2 C. the potential difference across each resistor is V and the current through each resistor is i /2 D. the potential difference across each resistor is V /2 and the current through each resistor is i E. none of the above is true ___ 3. Two identical light bulbs are in a typical American house, which is wired for electricity in parallel. There is nothing else using electricity in the house. If the potential difference supplied to the house is V , and the current flowing into the house is i , then which of the following is true:
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