Physics, asked by twinkle1125, 1 year ago

What is temperature coefficient of resistance??

Answers

Answered by kaalipavan

Temperature coefficient of resistance is the measure of change in electrical resistance of any substance per degree of temperature change.

The “alpha” (α) constant is known as the temperature coefficient of resistance

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Answered by Anonymous

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⏭️The resistance-change factor per degree Celsius of temperature change is called the temperature coefficient of resistance. This factor is represented by the Greek lower-case letter “alpha” (α). A positive coefficient for a material means that its resistance increases with an increase in temperature.

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In electrical engineering or in electronics, we know that resistance of a wire or a conductor changes with temperature. Although, it is desired that resistance should remain constant and it should be independent of the temperature. Thus, the change of resistance per degree change in temperature is called Temperature Coefficient of resistance, normally it is represented by a symbol Alpha:

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⏭️For pure metals, it is positive, means the resistance increases with temperature. For the elements like carbon, silicon, and germanium, this coefficient is negative, means the resistance decreases with increasing temperature. Thus, to make highly precise resistances where resistance does not change alloys are required.

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