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A closely wound solenoid of 1000 turns a...

A closely wound solenoid of 1000 turns and area of cross section `2xx10^(-4)m^(2)` carries a current of 2A. If is placed with its horizontal axis at `30^(@)` with the direction of a uniform horizontal magnetic field of 0.16 T.
What is the amount of work done to rotate the solenoid from stable orientation to unstable orientation?

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The correct Answer is:
0.128 J
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