group 2 - University of Minnesota School of Physics and...

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University of Minnesota Name: School of Physics and Astronomy ID No.: Physics 1302, Spring 2008, Section 300 TA: Hour Exam 2-Problem 1 A non-conducting sphere with a radius of 0.2 m has a uniformly distributed charge of +10 pC. Assume that a small hole is bored along the diameter of this sphere and a negative charge of -10 pC is free to move through that hole. Assume that the electric potential is zero at a distance of infinity. (a) What is the electric field (magnitude and direction) in the hole at a radius r ≤ 0.2 m from the center of the non-conducting sphere? (10 points) (b) What is the electric potential in the hole at a radius r ≤ 0.2 m from the center of the non- conducting sphere? (5 points) (c) What is the force (magnitude and direction) on the -10 pC charge in the hole at a radius r ≤ 0.2 m from the center of the non-conducting sphere? (5 points) (d) Assume that the -10 pC charge has a mass of 0.20 mg. What is the effective spring constant and period of oscillation of this charge?
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This note was uploaded on 10/07/2009 for the course PHYS 1302W taught by Professor Marshak during the Spring '08 term at Minnesota.

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group 2 - University of Minnesota School of Physics and...

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