A 250-Turn rectangular coil length 2.1 c...

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

`9.4 muJ`

`2.3 muJ`

`1.15 muJ`

`9.1 muJ`

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