Engineering Electromagnetics
Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Chapter 2, Problem 2.8P

A crude device for measuring charge consists of two small insulting spheres of radius a, one which is fixed in position The other is movable along the x axis and is subject to a restraining force, where k is a spring constant The uncharged spheres are centered x= 0 and x= d. the latter fixed lithe spheres ate given equal and opposite charges of Q/C. obtain the expression by which Q may be found as a function of r Determine the maximum charge that can be measured in terms of t0, k, and d. and state the separation of the spheres then What happens is a larger charge is applied?

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