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To protect a material from the influnce of an external magnetic field, the materials should...

Physics
JAMB 2004
To protect a material from the influnce of an external magnetic field, the materials should be kept
  • A. square steel ring
  • B. triangular zinc ring
  • C. soft iron ring
  • D. loop of copper wire
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Correct Answer: Option C
Explanation
In order to protect a material from the influence of an external magnetic field, the material is placed in a soft iron ring, usually referred to as magnetic screening.

There is an explanation video available below.

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Explanation Video

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