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Question

With the increase in temperature, the resistance of a pure metal ____.

A

increases

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B

decreases

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C

does not change

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D

first increases and then decreases

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Solution

The correct option is A

increases


With the increase in temperature, the random motion of electrons increases. As a result, the number of collisions of electrons with the positive ions increases in a metal. Hence, the resistance of a metal increases with increase in temperature.


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