Which of the following cannot induce a voltage in a loop of wire?
A) Moving a magnet near the loop.
B) Moving the loop near a magnet.
C) Expanding or contracting the loop in a region where there is no magnetic field.
D) Changing the current in a nearby loop.

Question

Quizplus · Accepted Answer

Expanding or contracting a loop in a region with no magnetic field does not induce a voltage, as there is no change in magnetic flux. The other options all involve a changing magnetic field, which can induce a voltage in a loop of wire.

Which of the Following Cannot Induce a Voltage in a Loop