Question

why we use voltmeter​

Answer 1

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.

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Answer 2

Answer:

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit.