For a permanent magnetic material - Materials and Components

Electronics and Communication Engineering (ECE) : Materials and Components - Quiz(MCQ)

For a permanent magnetic material

area of hysteresis loop should be small

initial relative permeability should be high

the residual induction and coercive field should be small

the residual induction and coercive field should be large

Correct Answer : Option (D) : the residual induction and coercive field should be large

Explanation : Materials suitable for permanent magnet have large hysteresis loop.

Hence residual and coercive field are large.

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