Question:
A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the wire.
Correct Option: 1
Solution:
Every part $(\mathrm{d} \ell)$ of the wire is pulled by force $\mathrm{i}(\mathrm{d} \ell) \mathrm{B}$ acting perpendicular to current \& magnetic field giving it a shape of circle.