What instrument is used to measure current flow in a circuit?

An ammeter is specifically designed to measure the flow of electric current in a circuit. It is connected in series with the circuit, allowing it to measure the amount of current, expressed in amperes (A), passing through it. This makes it a crucial tool for evaluating how much current is flowing at any given point in an electrical circuit.

A voltmeter, on the other hand, measures the voltage or potential difference between two points in a circuit and is connected in parallel. While a multimeter can measure current, voltage, and resistance, its design allows it to perform multiple functions rather than being solely dedicated to current measurement like an ammeter. An ohmmeter is utilized for measuring resistance in a circuit, which is distinct from measuring current flow. Thus, the ammeter is the most appropriate choice for measuring current flow specifically.