What instrument is used to measure the amount of current in an electrical circuit?

What instrument is used to measure the amount of current in an electrical circuit?

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

Answer: (A)

An ammeter is specifically designed to measure the flow of electric current in a circuit. It is usually connected in series with the circuit so that the current passing through the circuit also flows through the ammeter. The readings from an ammeter indicate the amount of current, measured in amperes, enabling maintenance technicians to diagnose circuit behavior and ensure that devices are operating within their required current specifications. In contrast, a voltmeter measures the voltage across two points in a circuit; an ohmmeter measures resistance; and a wattmeter assesses the power in watts consumed by the circuit. Each of these instruments serves a distinct purpose related to different electrical properties, reinforcing the importance of selecting the appropriate tool for specific measurements.

An ammeter is specifically designed to measure the flow of electric current in a circuit. It is usually connected in series with the circuit so that the current passing through the circuit also flows through the ammeter. The readings from an ammeter indicate the amount of current, measured in amperes, enabling maintenance technicians to diagnose circuit behavior and ensure that devices are operating within their required current specifications.

In contrast, a voltmeter measures the voltage across two points in a circuit; an ohmmeter measures resistance; and a wattmeter assesses the power in watts consumed by the circuit. Each of these instruments serves a distinct purpose related to different electrical properties, reinforcing the importance of selecting the appropriate tool for specific measurements.