Question

what are the factors affecting resistivity of a conductor ?

Answer 1

SI unit of resistance is Ohm, Ω; resistivity is Ohm meter, Ω m and that of current is Ampere, A.

Factors affecting resistance are: length of the conductor (L), area of cross-section of the conductor (A).

R α L and R α 1/A

Factors affecting resistivity are: material of the conductor, temperature at which the conductor is used.