4. In the figure below, q = 1.0 x 10-7 C and a = 5.0 cm, where V = 0 at infinity. a) What is the electric potential at the center of the square? b) What is the potential at the lower left corner due to the other three charges? c) How much work is required to set up the charge configuration in the figure, assuming the charges are initially infinitely far apart from one another? d) Give a brief physical interpretation of the sign of the work found in part c. +q -q a (+29) Answer: a) 0 V a α b)-31 kV a -29) c) -6.9 x 10-3 J

4. In the figure below, q = 1.0 x 10-7 C and a = 5.0 cm, where V = 0 at infinity. a) What is the electric potential at the center of the square? b) What is the potential at the lower left corner due to the other three charges? c) How much work is required to set up the charge configuration in the figure, assuming the charges are initially infinitely far apart from one another? d) Give a brief physical interpretation of the sign of the work found in part c. +q -q a (+29) Answer: a) 0 V a α b)-31 kV a -29) c) -6.9 x 10-3 J

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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