<P> A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit . Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter . </P> <P> A voltmeter in a circuit diagram is represented by the letter V in a circle . </P>

What does a volt meter do in a circuit