Question

A current carrying coil is placed in a constant uniform magnetic field B. Torque is maximum on this coil when plane of coil is:-

• A. Perpendicular to B
• B. Paralle to B
• C. At ${45}^0$ to B
• D. At ${60}^0$ to B

Answer 1

The correct option is A Perpendicular to B

A current carrying coil in placed in a constant uniform magnetic field $=B$. Torque is maximum on this coil when plane of coil

Because formula is -

Torque $=IA\times B$

$I$ and $B$ are perpendicular to $B$.