How is an electromagnet different from a bar magnet?

A) Bar magnets have a north and south pole, but electromagnets do not.

B) Electromagnets are strong, permanent magnets, but bar magnets are always weaker.

C) Electromagnets are only magnetized when a current flows through a wire wrapped around the core.

Eliminate

D) Bar magnets are attracted to ferromagnetic substances such as iron. Electromagnets are attracted to all metals.

Question

Guest

Chemistry

10 November, 15:23

How is an electromagnet different from a bar magnet?

A) Bar magnets have a north and south pole, but electromagnets do not.

B) Electromagnets are strong, permanent magnets, but bar magnets are always weaker.

C) Electromagnets are only magnetized when a current flows through a wire wrapped around the core.

Eliminate

D) Bar magnets are attracted to ferromagnetic substances such as iron. Electromagnets are attracted to all metals.

+2

Answers (2)

Know the Answer?

Kamari Le · Answer 1

Kamari Le 10 November, 15:47

0

a i think sorry if its wrong

Misael · Answer 2

C) Electromagnets are only magnetized when a current flows through a wire wrapped around the core.

Explanation:

An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet (bar magnet), amount of electric current that flows through electromagnet changes the strength of an electromagnet. The poles of an electromagnet are determined by flow of electricity.