Temperature dependence of resistance:

When temperature increases, the no. of collisions increases due to more internal energy and relaxation time decreases. Therefore, Resistance increases.

Temperature Coefficient of resistance:

If R2 < R1, then α is –ve.

R0 – Resistance at 0 ℃

R0 – Resistance at t ℃

R0 – Resistance at t1

R0 – Resistance at t2


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