Question

unit test
unit test review
active
what must be true in order for magnetism to induce an electric current in a wire?
there needs to be a switch in the circuit.
there cannot be a switch in the circuit.
the wire must be part of a closed circuit.
the wire must be part of an open circuit.

Explanation:

To induce an electric current via magnetism (electromagnetic induction), a closed circuit is required for the current to flow. A switch's presence/absence isn't the key; an open circuit can't have current flow. So the wire must be in a closed circuit.

Answer:

C. The wire must be part of a closed circuit.