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Question

The strength of a current carrying solenoid increases with a rise in its temperature.

A
True
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B
False
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Solution

The correct option is B False
Heating (increasing temperature) increases the resistance of the solenoid due to which the curent flowing through it will decrease. The strength of that magnetic field is the product of the ampere-turns of current going around the electromagnet., so it will also decrease.

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Magnetic Field Due to a Current in a solenoid
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