Which of the following is a difference between a permanent magnet and an electromagnet?(1 point)

Question

Responses

The magnetism of a permanent magnet can change; the magnetism of an electromagnet cannot change.
The magnetism of a permanent magnet can change; the magnetism of an electromagnet cannot change.

The material of a permanent magnet cannot change; the material of an electromagnet can change.
The material of a permanent magnet cannot change; the material of an electromagnet can change.

The pole locations of a permanent magnet cannot change; the pole locations of an electromagnet can change.
The pole locations of a permanent magnet cannot change; the pole locations of an electromagnet can change.

The strength of a permanent magnet can change by adding loops of wire coil; the strength of an electromagnet cannot change.

Answer 1

The strength of a permanent magnet can change by adding loops of wire coil; the strength of an electromagnet cannot change.