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A student uses two compass needles to investigate the magnetic field around a bar magnet....

Physics
WAEC 2018

A student uses two compass needles to investigate the magnetic field around a bar magnet. Which of the following diagrams show the correct directions of the needles?

  • A. A
  • B. B
  • C. C
  • D. D
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Correct Answer: Option B
Explanation

By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Also, they form closed lines.


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