Question

.A conducting loop carrying a current $i$ is placed in a uniform magnetic field acting perpendicular to the plane of the coil shown in figure. the loop will have a tendency to

• A. contract
• B. expand
• C. move towards positive X-axis
• D. move towards positive Y-axis

Answer 1

The correct option is B expand

Seeing a small part of the loop, we get that force given by $i(\overrightarrow{l}\times \overrightarrow{B})$ gives the direction of force away from the centre. So, combined together loop will have a tendency to expand.