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Intrinsic Semiconductor

Resistance of...

Question

Resistance of which of the following solids decreases on increasing temperature? (Consider no change in dimensions)

A

Metals

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B

Semiconductors only

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C

Insulators only

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D

Insulator and semiconductors

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Solution

The correct option is D Insulator and semiconductors
For metals, temperature coefficient of resistance is positive while in insulators and semiconductors temperature coefficient of resistance is negative.
Therefore resistance of insulators and semiconductors decreases on increasing the temperature.

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