Question

What is the difference between Resitance and Resistivity ?

Answer 1

Resistance is ratio of potential difference across a component to the current passing through it. It is measure of components resistance to the flow of electric charge. It is extensive property of a component which depends on the size or shape of the component.
Resistivity is measure of materials ability to oppose the flow of electric charge. It is intensive property of a component which is independent of the shape or size of the component.