Which component is used to measure electrical current?

The component used to measure electrical current is the ammeter. An ammeter is specifically designed to measure the flow of electric charge in a circuit, typically expressed in amperes (A). It works by being connected in series with the circuit, allowing the current to pass through it. The design of an ammeter typically includes a low resistance to minimize its impact on the overall circuit, ensuring accurate measurements without significantly altering the performance of the circuit being tested.

Other instruments mentioned have different primary functions: a voltmeter measures voltage across two points in a circuit and is typically connected in parallel; an ohmmeter measures resistance and is used to check the continuity of circuits or components; and a capacitor is an electronic component that stores electric charge and does not measure any parameter. Understanding these distinctions is crucial for anyone involved in electronics or amateur radio, as each instrument serves a specific role in the analysis and maintenance of electrical systems.