Which instrument is used to measure electrical voltage across components?

Which instrument is used to measure electrical voltage across components?

• A. Oscilloscopes
• B. Voltmeters
• C. Ammeters
• D. Ohmmeters

Answer: (B)

Measuring voltage means quantifying the electrical potential difference between two points in a circuit. A voltmeter is designed for that purpose and is connected across the two points you want to compare, so it’s placed in parallel with the component. This parallel connection ensures the meter reads the same potential difference without drawing significant current from the circuit. Voltmeter devices have very high input resistance, which minimizes their impact on the circuit’s operation. In contrast, an ammeter measures current in series, an ohmmeter measures resistance (typically with the power off), and an oscilloscope displays voltage as a function of time, though it can also show voltages, it’s used primarily to observe waveforms rather than provide a single DC voltage value. So, the instrument used to measure electrical voltage across components is the voltmeter.

Measuring voltage means quantifying the electrical potential difference between two points in a circuit. A voltmeter is designed for that purpose and is connected across the two points you want to compare, so it’s placed in parallel with the component. This parallel connection ensures the meter reads the same potential difference without drawing significant current from the circuit. Voltmeter devices have very high input resistance, which minimizes their impact on the circuit’s operation. In contrast, an ammeter measures current in series, an ohmmeter measures resistance (typically with the power off), and an oscilloscope displays voltage as a function of time, though it can also show voltages, it’s used primarily to observe waveforms rather than provide a single DC voltage value. So, the instrument used to measure electrical voltage across components is the voltmeter.