A closely wound solenoid of 2000 turns and the area of cross-section 1.5 × 10–4 m2 carries a current of 2.0 A. It is suspended through its center and perpendicular to its length, allowing it to turn in a horizontal plane in a uniform magnetic field 5 × 10–2 tesla making an angle of 30º with the axis of the solenoid. The torque on the solenoid will be
1
3 × 10–3 N.m
2
1.5 × 10–3 N.m
3
1.5 × 10–2 N.m
4
3 × 10–2 N.m