Multiple choice

Which of the following is not true about an electromagnet?

  1. This type of magnet is made by using an electric current.

  2. The core of an electromagnet is made of iron.

  3. They are used in electric bells.

  4. An electromagnet is a permanent magnet.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Electromagnet is not a permanent magnet. The magnetism is not retained once the current is switched off.

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