What instrument is used for measuring electrical current?

An ammeter is specifically designed to measure the flow of electrical current in a circuit, which is usually expressed in amperes (A). When measuring current, an ammeter is inserted in series with the circuit, allowing it to accurately capture the current flowing through that portion of the circuit. This characteristic makes it indispensable for electricians who need to assess current levels for troubleshooting or installation purposes.

In contrast, an ohmmeter measures resistance, a voltmeter measures voltage, and a wattmeter measures power. Each of these instruments serves a different function related to electrical parameters, so they are not suitable for measuring current directly like an ammeter.