What instrument is used to measure the current of electricity?

The amp meter, also known as an ammeter, is specifically designed to measure the current in an electrical circuit, typically expressed in amperes (A). It works by being connected in series with the circuit, allowing it to measure the flow of electrons directly. This makes it essential for diagnosing electrical issues, monitoring circuit loads, and ensuring that systems operate within their designed current capacities.

The volt meter measures voltage, or electrical potential difference, while the watt meter measures power consumption in watts. A resistance meter is used to measure the resistance within the circuit, typically in ohms. Each of these instruments serves different functions in the realm of electrical measurement, which highlights the importance of using the appropriate tool for the task at hand.