Temperature coefficient of resistance `alpha` and resistivity `rho` of a potentiometer wire must be

Temperature coefficient of resistance and resistivity of a potentiometer wire must be

Two wires are of same length and same area of cross-section. If first wire has resistivity rho_1 and temperature coefficient of resistance alpha_1 but second wire has resistivity rho_2 and temperature coefficient of resistance alpha_2 . Their series equivalent resistance is independent of small temperature changes. Then

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is

Two wires of resistance R_(1) and R_(2) at 0^(@)C have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is :

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is

Two wires of resistance R_(1) and R_(2) have temperature coefficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effective temperature coefficient of resistance is

Two wires of resistance R_(1) and R_(2) have temperature coeficient of resistance alpha_(1) and alpha_(2) respectively. These are joined in series. The effeictive temperature coefficient of resistance is

Discuss the effect of temperature on the resistance of a conductor. Hence define the temperature coefficient of resistance. What is the unit of the temperature coefficient of resistance?

Two equal resistance at 0^(@)C with temperature coefficient of resistance alpha_(1) and alpha_(2) joined in series act as a single resistance in a circuit the temperature coefficient of their single resistance will be