The fractional change in resistance per kelvin is known as:

Explanation

The fractional change in resistance per kelvin is called the temperature coefficient. The resistance coefficient, abbreviated as K, a dimensionless number, is how much resistance to the flow an obstacle has. The volumetric coefficient increases in volume per unit original volume per Kelvin rise in temperature is called the coefficient of volumetric expansion. The ratio increase in length original length for the 1-degree rise in temperature is called the coefficient of linear expansion