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Magnetism And Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
MCQ
Electromagnets are made of soft iron because soft iron has:
  • A
    High retentivity and high coercive force.
  • B
    High retentivity and low coercive force.
  • C
    Low retentivity and high coercive force.
  • D
    Low retentivity and low coercive force.
✓

Answer

  1. Low retentivity and low coercive force.

Explanation:

Electro magnets arc made of soft iron because soft iron has Low retentivity and Low coercive force.

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