Q. 3

The product of resistivity and conductivity of a cylindrical conductor depends on
A. temperature

B. material

C. area of cross section

D. none of these

Answer :

The resistivity of a conductor is given by



Where


is the resistivity of the conductor


is the conductivity of the conductor


The product of resistivity and conductivity is



The product of ρ and σ is unity. So it does not depends on anything. So option D is correct.

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