How is electricity measured?

Electricity is measured using various instruments depending on what aspect of electricity is being evaluated. In this case, the measurement in question pertains specifically to electrical current, which is quantified in amperes (amps). An ammeter is the device designed specifically for this purpose. It is connected in series within an electrical circuit to accurately measure the flow of electric current.

While the voltmeter measures voltage (the potential difference) across two points, and the wattmeter measures power (the rate of energy consumption), these devices focus on different aspects of electrical measurements. A thermometer, on the other hand, is entirely unrelated to electrical energy measurements and instead is used to measure temperature.

Thus, the ammeter is essential for understanding how much current flows in a circuit, which is a fundamental aspect of electrical measurements.