Which of the following has a negative tempera | vedclass

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(D) The temperature coefficient of resistance $(\alpha)$ is defined as the fractional change in resistance per unit change in temperature.For metals l

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Germanium

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(D) The temperature coefficient of resistance $(\alpha)$ is defined as the fractional change in resistance per unit change in temperature.For metals like Copper, Aluminium, and Iron, the resistance increases with an increase in temperature, resulting in a positive temperature coefficient of resistance.For semiconductors like Germanium, the number of charge carriers increases significantly with an increase in temperature, leading to a decrease in resistance.Therefore, semiconductors exhibit a negative temperature coefficient of resistance.

Which of the following has a negative temperature coefficient of resistance?

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