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When the temperature of a conductor incr...

When the temperature of a conductor increase the ratio of its resistivity and conductivity ......

A

remain constant

B

increase

C

decrease

D

increase or decrease

Text Solution

Verified by Experts

The correct Answer is:
C
decrease
`(sigma )/(rho ) = (1)/(rho^(2))`
and according to `rho = (m)/("ne"^(2) tau.) tau` decreases with increase in temperature
Hence `rho ` increases and `(1)/(rho^(2))` decreases.
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