Question

in the middle ages, people used lodestone, a magnet found in nature, as early compasses for navigation. today, however, most magnets are human - made. iron, nickel, and cobalt can be magnetized by placing them next to a very strong magnet, causing them to exert a constant magnetic force. electromagnets are made by running an electric current through a coil of wire, creating a magnetic field. this magnetic field is temporary, however. as soon as the electric current stops, the electromagnet stops being magnetic. without electricity, an electromagnet is unable to ______. choose one option a attract metal b be touched c remain coiled d be seen

Explanation:

The text says electromagnets need an electric current to create a magnetic field (for magnetism). Without electricity, they lose magnetism. Attracting metal needs magnetism, so without electricity, they can’t attract metal. Options B (being touched), C (remaining coiled), D (being seen) don’t relate to the magnetic function tied to electricity here.

Answer:

A. attract metal