Pedro uses a bar magnet to pick up a nail. he then touches the tip of the nail to some staples.
why do some of the staples stick to the nail?

a. the nail and the bar magnet are now both permanent magnets.
b. the nail has become a temporary magnet, while the bar magnet remains a permanent magnet.
c. the nail has become a permanent magnet, while the bar magnet has become a temporary magnet.
d. the nail and the bar magnet are now both temporary magnets.

Option b: The nail has become a temporary magnet, while the bar magnet remains a permanent magnet.

Explanation:

When the bar magnet picks up a nail, it magnetizes the nail. The domains of the nails temporarily align in one direction and it acts like a magnet. The nail becomes a temporary magnet. Therefore, when the tip of the nail touches some staples, the staples get attracted by the nail and sticks to it.

Hence, the correct option is b.

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