a magnet touching the loop of wire a magnet at rest inside the loop of wire a magnet at rest outside the loop of wire a magnet passing through the loop of wire
I gave my students this multiple choice question: Which set of conditions will produce an electric current in a closed loop of wire?

Only one answer is correct among these 4 choices:
- a magnet touching the loop of wire
- a magnet at rest inside the loop of wire
- a magnet at rest outside the loop of wire
- a magnet passing through the loop of wire

Could you tell me which one is correct?

a magnet passing through the loop of wire