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A closely wound solenoid of 2000 turns a...

A closely wound solenoid of `2000` turns and area of cross-section `1.5 xx 10^(-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 `5 xx 10^(-2)` tesla making an angle of `30^(@)` with the axis of the solenoid. The torque on the solenoid with the

A

`1.5xx10^(-3)`N.m

B

`1.5xx10^(-2)N.m`

C

`3xx10^(-2)N.m`

D

`3xx10^(-3)N.m`

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The correct Answer is:
B
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