A material intended for making a good permanent magnet should preferably possess:
Options

Question

A material intended for making a good permanent magnet should preferably possess:

G1 Physics · Accepted Answer

A permanent magnet must retain substantial magnetisation after the external magnetising field is removed. Therefore high retentivity is desirable. It should also resist accidental demagnetisation, so a large reverse field should be required to reduce its magnetisation to zero. Thus high coercivity is also desirable. Hence option A is correct.