Which instrument can measure both current and voltage?

Which instrument can measure both current and voltage?

• A. Voltmeter only
• B. Ammeter only
• C. Multimeter
• D. Oscilloscope

Answer: (C)

The ability to measure both current and voltage with a single tool is what a multimeter offers. It works by switching between modes: in voltage mode you place the probes across the component, and the meter reads the electrical potential difference (DC or AC). In current mode you place the meter in series with the circuit so the current flows through the meter’s internal shunt, and the reading reflects the current. This dual capability is why the multimeter is the best choice here. Voltmeter-only tools can read voltage but not current. Ammeter-only tools read current but not voltage. An oscilloscope mainly measures voltage as a function of time, and while you can sometimes infer current with additional equipment like a current probe, that isn’t its standard use.

The ability to measure both current and voltage with a single tool is what a multimeter offers. It works by switching between modes: in voltage mode you place the probes across the component, and the meter reads the electrical potential difference (DC or AC). In current mode you place the meter in series with the circuit so the current flows through the meter’s internal shunt, and the reading reflects the current. This dual capability is why the multimeter is the best choice here.

Voltmeter-only tools can read voltage but not current. Ammeter-only tools read current but not voltage. An oscilloscope mainly measures voltage as a function of time, and while you can sometimes infer current with additional equipment like a current probe, that isn’t its standard use.