Answer: Magnetic north pole facing the magnet.
- A Magnetic north pole facing the magnet
- B Magnetic south pole facing the magnet
- C No magnetic pole
- D Random pole
Correct answer: A. Magnetic north pole facing the magnet
Explanation: By Lenz's law, induced current opposes the magnet's approach. It creates a north pole (repulsion) facing the approaching north pole of magnet.
As a magnet approaches a coil, flux rises steadily and a constant non-zero EMF is induced (Faraday's law). Once the magnet stops moving, flux stays constant and the induced EMF drops to zero - EMF only exists while flux is actively changing.
Concept context
Faraday's and Lenz's laws, motional EMF, self/mutual inductance, eddy currents, and the AC generator - how a changing magnetic flux creates an electric current.