Question

What is variable resistance ?​

Answer 1

Answer:

Resistance is a property of conductor due to which it resists the flow of electric current through it. Variable Resistance: The component of an electric circuit which is used to regulate the current; without changing the voltage from the source; is called variable resistance.

Answer 2

Answer:

Potentiometer

A potentiometer is a three-resistor with a sliding or rotating contact that form an adjustable voltage divider .if only two terminal are used ,one end and the wiper ,it act as a variable resistor or rheostat.