What is current?

Current is defined as the flow or movement of electric charge through a conductor, such as a wire, and is typically measured in amperes (A). This concept is fundamental in understanding how electrical circuits function. Current represents the rate at which charge flows past a given point in the circuit, and it is vital for powering electrical devices by allowing energy to be transmitted from one point to another.

In a circuit, current depends on the voltage and the resistance, as described by Ohm's law (V = I × R), where V is voltage, I is current, and R is resistance. However, the essence of what current is revolves around the actual movement of charged particles, commonly electrons. This dynamic flow brings about the performance of electrical work, such as lighting a bulb or powering a motor. Understanding current is crucial for anyone studying electrical systems or working in fields related to electronics and engineering.