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.

Hope this helps.

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

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.