Question

Production of a permanent magnet depends upon
(a) Method of magnetisation (b) nature of the substances being magnetised (c) time of

magnetisatio​

Answer 1

Explanation:

To make a permanent magnet, ferromagnetic material is heated at incredibly high temperatures, while exposed to a strong, external magnetic field. ... After the external magnetic field is removed hard magnetic materials will keep most of their domains aligned, creating a strong permanent magnet

Answer 2

Answer:

c

Explanation:

because if u will take a magnet alone for long time

then the the property of magnet will become low

and if u will take two magnets together they will never lose their magnetic property

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