Question

Which of the following can create an induced emf across the ends of a conductor?

• A. Moving a conductor with respect to a magnetic field.
• B. Keeping a conductor stationary in a constant magnetic field.
• C. Moving the conductor and the magnet at the same rate in the same direction
• D. Keeping the conductor stationary in a time-varying magnetic field.

Answer 1

Answer: (A), (D)

The correct options are
A Moving a conductor with respect to a magnetic field.
D Keeping the conductor stationary in a time-varying magnetic field.

Relative motion between a conductor and magnetic field induces emf across the ends of the conductor. This is due to a change in magnetic flux. A time-varying magnetic field produces the same effect.