A closely wound solenoid of 2000 turns and area of cross-section 1.5 $ \times $ 10$-$4 m2 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 $ \times $ 10$-$2 tesla making an angle of 30o with the axis of the solenoid. The torque on the solenoid will be

Question

A closely wound solenoid of 2000 turns and area of cross-section 1.5 $ \times $ 10^$-$4 m² 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 $ \times $ 10^$-$2 tesla making an angle of 30^o with the axis of the solenoid. The torque on the solenoid will be

3 $ \times $ 10^$-$3 N m

1.5 $ \times $ 10^$-$3 N m

1.5 $ \times $ 10^$-$2 N m

3 $ \times $ 10^$-$2 N m

Solution

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