Question

the specific resistance of a conductor increases with

Answer 1

Hello!

We know the formula for specific resistance i.e. RA/L = ¶(rho)

Accordingly it should depend on Area and Length. But the fact is it depends neither on Area nor on length but on temperature and nature of the material.

Thanks:)

Answer 2

Very Good Question.Thanks for asking it.

Specific Resistance is also known as Resitivity.(ρ)

As we already know that :
Resistivity (ρ) = RxA/l
Where R is resistance of conductor
A is area of cross section of conductor
And l is length of conductor.
Resistivity of a substance is numerically equal to resistance of a rod of that substance which is 1 meter long and 1 square meter in cross section.

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Resistivity of substance depends upon:
1. Nature of substance
2. Temperature.

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So as temperature increases resistivity of the material also increases.