Question

2 wires are of same material but of different lengths and cross section. will their resistivity be same or different?

Answer 1

As the resistivity depends on temperature & the nature of the material the resistivity of the wires will not be affected therefore it remains same..

Answer 2

Resistivity of both the material Will remain same because
(1) resistivity doesn't depend upon cross section of material.
(2) resistivity is simple a intrinsic property of material that show how strong it oppose the electric current
(3) intrinsic property means property of material itself or within.