Question

9.3.2 quiz: magnetism
question 9 of 10
which statement best describes a bar magnet?
a. its on when its touching another magnet.
b. its always on.
c. its on when its near another magnet.
d. its on when there is an electric current.

Explanation:

A bar magnet is a permanent magnet. Permanent magnets are always magnetic (always "on") without the need for an external electric current or being near/touching another magnet. Option A is incorrect because a bar magnet doesn't rely on touching another magnet to be magnetic. Option C is wrong as it's not dependent on proximity to another magnet to be magnetic. Option D is for electromagnets (which need an electric current), not bar magnets.

Answer:

B. It's always on.