Question

Four wires, each of length $2.0m$, are bent into four loops $P,Q,R$ and $S$ and then suspended in uniform magnetic field. If the same current is passed in each, then the torque will be maximum on the loop.

• A. P
• B. Q
• C. R
• D. S

Answer 1

The correct option is D S

For a given perimeter the area of circle is maximum.

So magnetic moment of $\left(S\right)$ is greatest.