The square loop in the picture is lowered betweenthe poles of the magnet. During

Question

The square loop in the picture is lowered betweenthe poles of the magnet. During this process, the magnetic force on electrons in the loop is.

a)the same in the top and bottom of the loop, so there is no current.
b)stronger in the top of the loop than in the bottom, so the current flows counterclockwise.
c)stronger in the top of the loop than in the bottom, so the current flows clockwise.
d)stronger in the bottom of the loop than in the top, so the current flows counterclockwise.
e)stronger in the bottom of the loop than in the top, so the current flows clockwise.

The answer is D, but im having a hard time figuring out as to why the answer is D.

Explanation / Answer

As wire is perpendicualr to the direction of field force is grater at lower part of the loop as compared to top part. Because, in the given picture the flux through the bottom is greater than the top of the loop, hence greater induced current is produced.

Force on electron

F = I L X B

Apply right hand rule.

A square loop of wire is carrying current in the counterclockwise direction, because, there is a horizontal uniform magnetic field pointing to the right.

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