Which device is specifically designed to measure electrical current?

The ammeter is specifically designed to measure electrical current. It operates by measuring the flow of electric charge through a conductor, usually in amperes (A). When connected in series within a circuit, the ammeter allows for the assessment of the current directly flowing through that portion of the circuit. This capability is crucial for electricians and engineers who need to understand how much current is passing through a system to ensure safety and functionality.

Other devices have different purposes: a voltmeter measures voltage across two points in a circuit, a wattmeter measures power (in watts) by taking into account both current and voltage, and an ohmmeter measures resistance within a circuit. Each of these instruments serves a unique function that is not interchangeable with the ammeter’s role in assessing electrical current.