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19.07.2022 - 12:21

Explain the following: (A) A blacksmith can reduce the magnetic strength of an iron bar by heating it. (B) You can reduce the magnetic field of a bar magnet by dropping it on a hard floor.

Question:

Explain the following:

(A) A blacksmith can reduce the magnetic strength of an iron bar by heating it.

(B) You can reduce the magnetic field of a bar magnet by dropping it on a hard floor.

Answers (1)

Lois April 4, 2023 в 13:16

(A) Heating a magnetized iron bar causes its magnetic domains to lose their alignment. When the magnetic domains lose their alignment, the magnetic strength of the iron bar decreases. (B) Dropping a bar magnet on a hard floor can cause its magnetic domains to become disordered. When the magnetic domains become disordered, the magnetic strength of the bar magnet decreases. However, dropping a bar magnet repeatedly may also cause it to become physically damaged, which could also reduce its magnetic field.

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