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Magnetism And Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetism And Matter1 Mark
MCQ
Alnico is used for making permanent magnets because it has:
  • A
    High coercivity and high retentivity.
  • B
    High coercivity and low retentivity.
  • C
    Low coercivity and low retentivity.
  • D
    Low coercivity and high retentivity.
✓

Answer

  1. High coercivity and high retentivity.

Explanation:

Alnico is used for making permanent magnet because it can be easily magnetised in external magnetic field and It will not lose its magnetic property due to its high coercivity and low retentivity.

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