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A short bar magnet is placed in earth's magnetic field, as shown above, which of...

Physics
JAMB 1984

A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

  • A. I only
  • B. II only
  • C. III only
  • D. I and II
  • E. I,II and III
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Correct Answer: Option C
Explanation

When the magnet is placed with its north pole pointing toward the earth's magnetic north, the two neutral points will occur at III, according to the diagram above.

 


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