Explain the motor effect and how a current-carrying loop can rotate in a magnetic field.

Explain the motor effect and how a current-carrying loop can rotate in a magnetic field.

• A. A force acts on the current-carrying wire, but only if the wire is straight, not a loop.
• B. Opposite sides experience opposite forces, producing torque and rotation.
• C. The current-carrying loop warms and expands.
• D. The loop becomes superconducting.

Answer: (B)