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A 250-turns recantagular coil of length...

A 250-turns recantagular coil of length 2.1 cm and width 1.25 cm carries a current of `85 muA` and subjected to magnetic field of strength `0.85 T`. Work done for rotating the coil by `180^(@)` against the torque is

A

`4.55muJ`

B

`2.3muJ`

C

`1.15muJ`

D

`9.1muJ`

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The correct Answer is:
A
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