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A method of demagnetization is 

Physics
JAMB 2025

A method of demagnetization is 

  • A. placing the magnetic bar in a solenoid
  • B. double-stroking the magnet with soft in n-s direction
  • C. heating a magnetic bar red hot and allowed to cool e-w direction
  • D. hammering the magnetic bar repeatedly in n-s direction
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Correct Answer: Option C
Explanation

This process disrupts the alignment of magnetic domains, effectively demagnetizing the bar.

There is an explanation video available below.

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Explanation Video

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