A Voltmeter is a measuring instrument which measures the voltage between the two nodes in an electric circuit. In analog voltmeters the pointer moves across a scale in proportional to the voltage of the circuit. Digital voltmeters have a numerical display of voltage by using an analog to digital converter.

What is voltmeter and its function?

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. An ammeter is a measuring device used to measure the electric current in a circuit.