To measure which of the following is a Voltmeter used?

Correct option is D

The correct answer is (d) Potential difference.
· A voltmeter is used to measure the potential difference (voltage) between two points in an electric circuit.
· It is designed to be connected in parallel with the component or section of the circuit where the voltage is to be measured.
· The voltmeter measures how much energy is transferred per unit of charge as the charge moves between these two points.
· The unit of measurement for potential difference is the Volt (V).
· Potential difference, or voltage, is a key parameter in understanding the behavior of electrical circuits and is essential in diagnosing circuit functionality.
Explanation of Other Options:
· Electric charge: This is measured using devices like an electroscope, not a voltmeter.
· Resistance: This is measured using an ohmmeter, not a voltmeter.
· Electric current: This is measured using an ammeter, which is connected in series in the circuit.