Which instrument measures amperage?

Which instrument measures amperage?

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

Answer: (A)

The instrument that measures amperage is the ammeter. Amperage, or current, is the flow of electric charge, and an ammeter is designed to read that flow in amperes. It’s connected in series with the circuit so all the current passes through it, and it has very low internal resistance so it doesn’t noticeably affect the circuit’s operation. In contrast, a voltmeter is connected in parallel to measure voltage, an ohmmeter measures resistance by applying a small internal voltage, and a hygrometer measures humidity. Some modern meters use a clamp around a conductor to measure current without breaking the circuit, but the traditional device for amperage is the ammeter.

The instrument that measures amperage is the ammeter. Amperage, or current, is the flow of electric charge, and an ammeter is designed to read that flow in amperes. It’s connected in series with the circuit so all the current passes through it, and it has very low internal resistance so it doesn’t noticeably affect the circuit’s operation. In contrast, a voltmeter is connected in parallel to measure voltage, an ohmmeter measures resistance by applying a small internal voltage, and a hygrometer measures humidity. Some modern meters use a clamp around a conductor to measure current without breaking the circuit, but the traditional device for amperage is the ammeter.