An instrument used for measuring electrical potential difference between two points in an electric circuit is called?

• A. Voltmeter
• B. Ammeter
• C. Ohmmeter
• D. Capacitor

Answer: (A)

A voltmeter measures the electrical potential difference between two points. To read the voltage accurately, you place it in parallel across those points so it taps into the same potential difference without forcing current through the circuit. It has a very high internal resistance, so it draws only a tiny, practically negligible current, preserving the circuit’s behavior. By contrast, an ammeter is used to measure current and is placed in series, an ohmmeter measures resistance by applying a small current, and a capacitor stores electrical energy rather than measuring voltage.