A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3 amp. A thin coil havi
Channel: Doubtnut
Date: 23/08/2020

A solenoid of length 0.4 m and having 500 turns of wire carries a current of 3 amp. A thin coil having 10 turns of wire and of radius 0.01 m carries a current of 0.4 amp. The torque (in Nm) required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid is (`mu_(0) = 4pi xx 10^(-7)` V-s/A-m)