7. (a) How much charge is required to raise an isolated metallic sphere 8. of 1.0-meter radius to a potential of 106 volts? Repeat for a sphere of 1.0-cm radius. (b) In electrostatic generators such as van der Graaf machines, one generally uses large conducting spheres. Why are they large, considering that the same potential can be achieved for a smaller charge with a small sphere? Derive an expression for the work required to put four charges together in a square as indicated in the diagram at right. a +9 3 -9 a 4 1 2 -9 a +q 古 a

7. (a) How much charge is required to raise an isolated metallic sphere 8. of 1.0-meter radius to a potential of 106 volts? Repeat for a sphere of 1.0-cm radius. (b) In electrostatic generators such as van der Graaf machines, one generally uses large conducting spheres. Why are they large, considering that the same potential can be achieved for a smaller charge with a small sphere? Derive an expression for the work required to put four charges together in a square as indicated in the diagram at right. a +9 3 -9 a 4 1 2 -9 a +q 古 a

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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