Question

A silver wire has a resistance of 4.2 ΩΩ at 27 0C and resistance 5.4 ΩΩ at 100 0C. Determine the temperature coefficient of resistance​

Answer 1

Answer:

0.00168

Explanation:

Answer 2

Answer:

$\alpha =3.9 * 10^{-3}$

Explanation:

Resistance variation with temperature is given as

$R=R_{ref} [1+\alpha T-T_{ref} ]$

where $R_{ref}$ is the resistance at reference temperature.

Let the reference temperature is $27^{o} C$.

$5.4=4.2[1+\alpha (100-27)]$

$\alpha =3.9 * 10^{-3}$