alleryStart learning →Materials used for permanent magnets should have
Alow retentivity, low coercivity
Bhigh retentivity, high coercivity
Clow retentivity, high coercivity
Dhigh retentivity, low coercivity
Answer & Solution
Correct answer: B. high retentivity, high coercivity
A hard magnet must retain strong magnetization and resist demagnetization.
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