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As shown in fig. a conducting ring R is ...

As shown in fig. a conducting ring R is placed on the axis of a bar magnet M. The plane of R is perpendicular to the axis M can move along this axis _____

A

contract

B

expand

C

move towards positive X-direction

D

move towards negative X-direction

Text Solution

Verified by Experts

The correct Answer is:
B
Electric currents passing through any two points of diameter are in opposite direction, so repulsive force is found there and the ring has tendency to expand.
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