A circular loop of wire lies in the x-y plane so that the axis of the loop lies

Question

A circular loop of wire lies in the x-y plane so that the axis of the loop lies along z (see the figure below). A magnetic field of magnitude B is parallel to the z axis. This field is positive (i.e., along the +z direction) and is the same everywhere within the area of the loop. B is decreasing with time. Loop in a decreasing B field

Select one:

a. There will be an induced current that is counterclockwise around the loop (as viewed from above)

b. There will be no effect on the loop, since the field is perpendicular to the loop.

c. There will be an induced current that is clockwise around the loop (as viewed from above).

d. The magnitude of any induced emf depends on the original magnitude of B.

Explanation / Answer

a. There will be an induced current that is counterclockwise around the loop (as viewed from above)

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