20
QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 20 • TX-Physics B

What is the main difference between a permanent magnet and a temporary magnet?

Answer
A
A permanent magnet is made of a ferromagnetic material, while a temporary magnet is not.
B
A temporary magnet attracts only metal objects, while permanent magnets attract both metal objects and other magnets.
C
The domains in a temporary magnet easily lose alignment, but the domains in a permanent magnet keep their alignment.
D
There are domains in a permanent magnet, but not in a temporary magnet.

Explanation

Both permanent and temporary magnets have magnetic domains. The key difference is how well those domains stay aligned: a permanent magnet keeps its alignment, while a temporary magnet’s domains easily become disordered when the magnetic influence is removed. Therefore, choice C is correct.

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