Question

Which of the following ways will NOT cause a magnet to lose its magnetism?

• A. Heating it strongly over a flame
• B. Dropping it on the floor repeatedly
• C. Coating it with a layer of oil
• D. Hitting it with a hammer repeatedly

Answer 1

The correct option is C

Coating it with a layer of oil

On coating a magnet with a layer of oil, the magnet does not lose its magnetism. Most magnetic materials lose their magnetism if heated above a point known as the Curie temperature. Similarly, dropping a magnet on the floor repeatedly and hitting a magnet with a hammer repeatedly can lead to loss of magnetism.