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A short electric dipole is placed at a d...

A short electric dipole is placed at a distance x from centre O on the axis of a ring of radius R and charge Q is uniformly distributed over tis.


[(a) (find the net force acting on the dipole b) The work done external agent in rotating the dipole through `180^(@)` would be

A

`2KQP (x)/((R^(2)+x^(2))^(3//2))`

B

`KQP ((x)/((R^(2)+x^(2))^(3//2)))`

C

`-KQP((x)/((x^(2)+R^(2))^(3//2)))`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
A
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