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A closely wound solenoid of 200 turns an...

A closely wound solenoid of `200` turns and area of cross-section `1.5xx10^(-4)m^(2)` carries a current of `2.0 A` It is suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field `5xx10^(-2)T`, making an angle of `30^(@)` with the axis of the solenoid. The torque on the solenoid will be

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The correct Answer is:
`5 xx 10^(-2) J T^(-1) , 5 xx 10^(-3) J 2 xx 10^(-2) J `
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