Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 32, Problem 27SP

The square coil shown in Fig. 32-11 is 20 cm on a side and has 15 turns of wire. It is moving to the right at 3.0 m/s. Find the induced emf (magnitude and direction) in it (a) at the instant shown and (b) when the entire coil is in the field region. The uniform magnetic field is 0.40 T into the page.

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A circular loop of wire of radius r = 1.0 m is placed in a region where an external uniform magnetic field is perpendicular to the plane of the loop. The external magnetic field vector points in, perpendicular to the page. During the course of 0.150 seconds, the field magnitude B is DECREASED uniformly (i.e., linearly in time) from 0.64 T to 0.25 T. (a) What is the direction of the induced current i in the loop, clockwise or counterclockwise. Please indicate this direction by drawing a curved arrow at the wire. What is the direction of the induced magnetic field, in or out? (b) What is the magnitude ε of the average induced electromotive force (emf)? (c) If the resistance of the wire is 2.00 ohms, then what is the magnitude of the induced current? How much heat is created in a period of 1.0 minute?
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