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# A rectangular loop of wire is situated so that one end ISBN: 9780321856562 45

## Solution for problem 6P Chapter 7

Introduction to Electrodynamics | 4th Edition

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Problem 6P

A rectangular loop of wire is situated so that one end (height h) is between the plates of a parallel-plate capacitor (Fig. 7.9), oriented parallel to the field E. The other end is way outside, where the field is essentially zero. What is the emf in this loop? If the total resistance is R, what current flows? Explain. [Warning: This is a trick question, so be careful; if you have invented a perpetual motion machine, there’s probably something wrong with it.] Step-by-Step Solution:

Step 1 of 4</p>

We are required to determine the emf of the loop and the current that flows through it.

Step 2 of 4</p>

The expression for emf of an is . But for an electrostatic field .

Also, the flux through a closed surface is zero. Therefore, the emf is also zero.

Step 3 of 4

Step 4 of 4

##### ISBN: 9780321856562

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