Multiple choice

Permanent magnets can be damaged by which of the following?

  1. Exposure to heat

  2. Hammering

  3. Dropping form a height

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All three actions can damage permanent magnets. Heat increases molecular motion, randomizing magnetic domain alignment (Curie temperature). Hammering or dropping physically disrupts the alignment of magnetic domains in the material. All these methods can weaken or completely destroy a permanent magnet's strength.

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