Question

Which of the following does not affect the magnetic properties of a permanent magnet?

• A. Heat
• B. Radiation
• C. Other magnets in close proximity to the magnet
• D. Painting

Answer 1

The correct option is D

Painting

- When a magnet is heated or hammered, its magnetic properties or magnetism can be lost. This is because the orientation of micromagnets (domains) inside a magnet changes as the magnet undergoes any physical or chemical changes.

- Presence of other magnets in close proximity to the magnet affects the magnetic properties of the magnet as it may either attract or repel the magnet.

- Painting doesn't have any effect on the magnetic strength as long as the layer of the paint has infinitesimal thickness