What do voltmeters measure?

What do voltmeters measure?

• A. Current
• B. Power
• C. Voltage
• D. Resistance

Answer: (C)

Voltmeters measure the electrical potential difference, or voltage, between two points in a circuit. They’re connected in parallel across the part you want to test, so they don’t significantly draw current from the circuit. Their high input resistance minimizes loading, allowing an accurate voltage reading measured in volts. By contrast, current is measured with an ammeter placed in series, power comes from multiplying voltage by current, and resistance is found with an ohmmeter or from V = IR. So the best answer is voltage.

Voltmeters measure the electrical potential difference, or voltage, between two points in a circuit. They’re connected in parallel across the part you want to test, so they don’t significantly draw current from the circuit. Their high input resistance minimizes loading, allowing an accurate voltage reading measured in volts. By contrast, current is measured with an ammeter placed in series, power comes from multiplying voltage by current, and resistance is found with an ohmmeter or from V = IR. So the best answer is voltage.