Question

what is the meaning of this statement------ both the resistance and resistivity of a material vary with temperature.​

Answer 1

Explanation:

Both depends upon the temperature and nature of material. Resistance increases with increase in temperature of conductor whereas resistivity of metal increases with increase in its temperature while for semiconductors it decreases with increase in temperature.

Answer 2

Answer:

Explanation:Resistance and resistivity vary with temperature means -when we increase the temperature,the random motion of electron increases.As a result the number of collision increases .Hence ,the resistance of conductor and resistivity increases with the increase in temperature.

i.e. Resistance and resistivity directly proportional to temperature.

But for some alloys like manganin,constantan and nichrome temperature remain unaffected.