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JAMB Physics 1986 Question 44

Question 44

Magnetism

Which of the following is true of magnetism?

  1. A.Iron filings cling mainly round the ends of a bar magnet
  2. B.The freely suspended bar magnet comes to rest in the geographic north-south direction.
  3. C.Like poles attract
  4. D.Lodestone is a non-magnetic oxide.
Show the answer and explanation

Answer: A (Iron filings cling mainly round the ends of a bar magnet)

Explanation

The magnetic force is strongest at the poles, near the ends of a bar magnet, so iron filings gather there. A suspended magnet points along the magnetic (not geographic) meridian.