A circular loop of wire of radius r = 1.0 m is placed in a region where an exter

Question

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 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 0.16 seconds, the field magnitude B is enhanced uniformly (i.e., linearly in time) from 0.25 T to 0.64 T. 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? Circle one. What is the magnetic |epsilon| of the average induced electromotive force (emf)?

Explanation / Answer

a.) polarity of current will be in direction that opposses the change in magnetic flux that produced it

so it will be in anticlockwise direction

b.) it will be IN as the currect is in anticlockwise

c.) = -Nd/dt

magnitude = d/dt where = B.A.cos

= *1*1 * (0.64-0.25)/0.16

= 7.657 V

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