Practicing Success
A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. The torque needed to maintain the needle in its position, will be: |
$\sqrt{3} W$ $W$ $\sqrt{3} W/2$ $2 W$ |
$\sqrt{3} W$ |
The correct answer is Option (1) → $\sqrt{3} W$ |