What is the purpose of an ammeter?

The purpose of an ammeter is to measure the current flowing through a load in a circuit. This device is specifically designed to be placed in series with the load, allowing for an accurate reading of the current that is passing through it. This measurement is essential for diagnosing circuit performance, understanding power consumption, and ensuring the proper functioning of electrical systems.

In contrast, measuring voltage requires a voltmeter, which is connected in parallel with the component or load to ascertain the potential difference across it. Similarly, resistance is measured using an ohmmeter, typically part of a multimeter, which calculates the opposition to current flow in a circuit component. Displaying waveforms is the role of an oscilloscope, which visually presents the variations in electrical signals over time, rather than measuring current directly. Each instrument has a distinct purpose, which reinforces the importance of using an ammeter specifically for current measurements.