Multiple choice

Which of the following statements about an electromagnet is not true?

  1. It is a temporary magnet.

  2. It produces a much weaker field than a permanent magnet.

  3. Its strength can be easily varied.

  4. Its polarity can be reversed.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electromagnets can produce a very strong magnetic field. Permanent magnets produce a much weaker field than electromagnets.

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