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Unformatted text preview: Platt, David Homework 7 Due: Sep 23 2005, 4:00 am Inst: Ken Shih 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 4) 10 points Consider two solid conducting spheres with radii r 1 = 4 R and r 2 = 9 R ; i.e. , r 2 r 1 = 9 R 4 R = 9 4 . The two spheres are separated by a large distance so that the field and the potential at the surface of sphere #1 only depends on the charge on #1 and the corresponding quan- tities on #2 only depend on the charge on #2. Place an equal amount of charge on both spheres, q 1 = q 2 = Q. r 1 q 1 #1 r 2 q 2 #2 After the electrostatic equilibrium on each sphere has been established, what is the ratio of the potentials V 2 V 1 at the centers of the two solid conducting spheres? 1. V 2 V 1 = 4 9 2....
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