Question

The product of conductivity and resistivity of a

(a) depends on pressure applied

(b) depends on current flowing through conductor

(c) is the same for all conductors conductor  

(d) varies from conductor-to-conductor

Answer 1

(c) is the same for all conductors conductor  

As, we know that,

resistivity = 1 / conductivity

or resistivity x conductivity = 1

Therefore, the product of conductivity and resistivity of a conductor is same for all conductors and it is independent of potential applied or current flowing through the conductor.