Define temperature coefficient of resistance of a conductor. Give the expression for temperature coefficient.

Explanation

The temperature coefficient of resistance of a material of conductor may be defined as the ratio of change in its resistance per kelvin raise of temperature to its resistance at `0^(@)C`.
`alpha=(R-R_(0))/(R_(0)t)//""^(@)C`
Where, `R_(0)-` Resistance of the conductor at `0^(@)C`
for two different resistences at `t_(1)` and `t_(2)` temperatures.