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# Your instructor only sees the scantron so make sure

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Unformatted text preview: instructor only sees the scantron so make sure it has all the correct information. 6. This is a closed book, 90 minute exam. Turn off and put away all electronic devices. You may use a calculator and one 3”x5” note card or equivalent. k = 1/4πε0 =9x109 Nm2/C2 e = 1.6x10-19 C μ = micro =10-6 ε0 = 8.85x10-12 C2/Nm2 1 eV= 1.6x10-19 J g = 9.8 m/s2 me = 9.1 x 10-31 kg MP=1.67 x 10-27 kg Version 1 Page 1 1. A large ring with charge Q uniformly distributed around it and with radius 2R is positioned so that its axis coincides with the axis of a smaller ring of uniform charge q and radius R. A point on the axis is a distance R from the smaller ring and 2R from the larger ring as shown. What must Q be such that the electric potential at the point due to the two rings is zero? (Take the reference V = 0 to be at infinite separation.) Q q 2R R R A) B) C) D) E) 2R -4q -2q +2q +q/2 +4q 2. In a certain region of space the electric potential increases linearly with x, where x is the distance traveled to the east. Th...
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## This test prep was uploaded on 03/22/2014 for the course PHYSICS 240 taught by Professor Davewinn during the Spring '08 term at University of Michigan.

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