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



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?
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  • A A
  • B B
  • C C
  • D D
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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