question....................

Asked by poojathally | 22nd Feb, 2010, 12:58: PM

Expert Answer:

Dear student,

The " alpha" (α) constant is known as the temperature coefficient of resistance, and symbolizes the resistance change factor per degree of temperature change. Just as all materials have a certain specific resistance (at 20o C), they also change resistance according to temperature by certain amounts. For pure metals, this coefficient is a positive number, meaning that resistance increases with increasing temperature.

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Answered by  | 22nd Feb, 2010, 01:26: PM

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