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A superconducting ring of radius 'a' and...

A superconducting ring of radius 'a' and inductance L is located in a uniform magnetic field of induction B. The plane of ring is parallel to B and the current in the ring is zero. Then the ring is turned through `90^(@)` so that plane is perpendicular to the field. What is the work done in turning the ring?

A

`(pi^(2)a^(4)B^(2))/(2L)`

B

`(pi^(2)a^(2)B^(2))/(2L)`

C

`(pi a^(2)B^(2))/(2L)`

D

`(pi^(2)a^(4)B^(2))/(4L)`.

Text Solution

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The correct Answer is:
A
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