Q147 / 180 · COMEDK 2016 · Physics

Material of permanent magnet has

Correct answer
A
high retentivity and high coercivity
B
low retentivity and high coercivity
C
low retentivity and low coercivity
D
high retentivity and low coercivity

Solution

Permanent magnet should have high retentivity to persist magnetism on removal of magnetic field. It should also have high coercivity, so that the magnetism is not lost by external magnetic field.

Hence, the correct answer is option: 'A'.

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