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Magnetic and Non Magnetic Material

If a magnet i...

Question

If a magnet is heated, it can lose its magnetism. True or false?

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Solution

True. If a magnet is heated above a certain temperature, it can lose its magnetism.

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Q. A. Ferromagnetic materials will lose their magnetism if heated above a point known as the Curie temperature.
B. You would have to re-magnetize the magnet again, either in a solenoid or with another permanent magnet, in order to restore the magnetism.
C. If you heat a magnet up a little bit, it will lose some of its magnetism, but on returning to room temperature full magnetism can be restored.
Which among the following is/are true?

Q. A permanent magnet can lose its magnetism with time

Q. How can a magnet lose its magnetism ? How should magnets be stored so that they do not lose their magnetism gradually ?

State True or False :

A permanent magnet can be made strong by passing current through an insulated coil wound over it .

Q. State whether True or False :

If electric current is passed through metal body then it behaves as magnet.

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