Question

Give two points of difference between resistance and resistivity.

Answer 1

Resistance	Resistivity
1. It is the property of a conductor to resist the flow of charges through it.	It is the resistance per unit length of a a unit cross section of the material.
2. Its unit is ohm (Ω).	Its unit is ohm metre (Ωm).
3. Resistance depends on length, cross­sectional area of the wire, and material medium that depends on its temperature. R α  \(\frac { L }{ A }\)(RαT)	Resistivity is the constant value for a conductor only at a given temperature. It varies with temperature. P α T. Resistivity increases with rise in temperature of metals and alloys.