What is the function of a variable resistor

A) To store electrical energy

B) To amplify electrical signals

C) To control or adjust the resistance in an electrical circuit

D) To convert electrical energy into mechanical energy

Correct Answer:

C) To control or adjust the resistance in an electrical circuit

Explanation:

A variable resistor, also known as a potentiometer or rheostat, is used to control or adjust the resistance in an electrical circuit. It allows users to vary the amount of resistance in a circuit, which can be useful for regulating current, voltage, or controlling the brightness of lights, among other applications. Options A, B, and D do not accurately describe the function of a variable resistor.