Question

what component becomes a temporary magnet when electricity is flowing through the circuit? core battery switch wire coil

Explanation:

A wire - coil can act as an electromagnet when electricity flows through it, becoming a temporary magnet. A core is part of an electromagnet but alone is not a temporary magnet when current flows. A battery provides electrical energy and a switch controls the flow of current, neither of which become temporary magnets when current flows.

Answer:

D. wire coil