Question

difference between resistor and resistance

Answer 1

Resistance is the opposition offered to the current.
It is voltage per current.
R=V/i

Resistor is one of the component of electrical circuit which limits the flow of electric current.

Answer 2

A resistor is an electric component with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.. Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it.