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

Question

Responses

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

Answer 1

The correct response is:

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

This highlights one of the key differences between permanent magnets, which have fixed magnetic poles, and electromagnets, which can have their poles reversed by changing the direction of the electric current.