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Question

Magnetisation (M) of a material depends on magnetising field (H) according to following graph. If same variation is studied at higher temperature then slope of the graph will :
1094516_6dc68c8a64394f4e8b3e23ec32d4f4ee.png

A
Remain same
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B
increases
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C
Decreases
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D
may increase or decrease
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Solution

The correct option is A Remain same
Temperature affects magnetism by either strengthening or weakening a magnet's attractive force. But at any temperature the relation between magnetism and magnetising field will be same. So at higher temperature, slope of the graph will be same.

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