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A bar magnet is placed near and lying along the axis of a solenoid connected...

Physics
JAMB 2022

A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?

  • A. the magnet is moved towards the stationary solenoid
  • B. there is no relative motion
  • C. the magnet is moved away from the stationary solenoid
  • D. the solenoid is moved away from the stationary magnet
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Correct Answer: Option B
Explanation

If both the coil and the magnet are stationary, then there is no change in the magnetic flux and hence no current is induced in the coil.

There is an explanation video available below.

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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts