Question

$\sf{what \: is \: voltmeter \: ??}$

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Answer 1

Answer:

Voltmeter, instrument that measures voltages of either direct or alternating electric current on a scale usually graduated in volts, millivolts (0.001 volt), or kilovolts (1,000 volts). ... The potentiometer operates by comparing the voltage to be measured with known voltage; it is used to measure very low voltages.

Answer 2

A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.