A solenoid of length 0.4 m having 500 turns of wire carries a current of 3 A. A coil of 10 turns and radius 0.01 m carries a current of 0.4 A. What will be the torque required to hold the coil in the middle of the solenoid with its axis perpendicular to the axis of the solenoid? |
$4.9 × 10^{-7} Nm$ $5.9 × 10^{-6} Nm$ $3.75 × 10^{-7} Nm$ $6.45 × 10^{-6} Nm$ |
$5.9 × 10^{-6} Nm$ |
The correct answer is Option (2) → $5.9 × 10^{-6} Nm$ |