Question

A current-carrying ring is placed in a magnetic field. The direction of the field is perpendicular to the plane of the ring.

• A. There is no net force on the ring.
• B. The ring will tend to expand
• C. The ring will tend to contract
• D. Either B or C depending on the directions of the current in the ring and the magnetic field.

Answer 1

Answer: (D)

Either B or C depending on the directions of the current in the ring and the magnetic field.

Answer 2

The ring will either tend to expand or contract, depending on the relative directions of the current in the ring and the magnetic field.