Which statement best describes a bar magnet?

A. It's on when it's near another magnet.
B. It's always on.
C. It's on when it's touching another magnet.
D. It's on when there is an electric current.



Answer :

Final answer:

A bar magnet is a permanent magnet with two poles that create a magnetic field. It does not need an electric current to exhibit magnetic properties. The magnetic field of a bar magnet can be observed using a compass needle.


Explanation:

A bar magnet is a permanent magnet that has two poles, a north pole, and a south pole. These poles create a magnetic field around the magnet.

Unlike an electromagnet, a bar magnet does not require an electric current to be present to exhibit magnetic properties. It remains magnetized and has a magnetic field as long as it is not demagnetized.

When a compass needle is placed near a bar magnet, it aligns itself along the magnetic field lines, indicating the direction of the magnetic field of the bar magnet.


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