A closely wound solenoid of 2000 turns and area of cross-section 1.5 x 10 mcarries a current of 2.0 A. It suspended through its centre and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 102 tesla making an angle of 30 with the axis of the solenoid. The torque on the solenoid will be: (a) 3 10 N-m (c) 1.5x 10 N-m (b) 3 x 10 N-m (d) 1.5x 10 N-m