Current refers to the flow of electric charge in a conductor, typically measured in amperes (A). It is a fundamental concept in electricity and is essential for the operation of electrical devices. Current can be either direct current (DC), where the flow of charge is constant, or alternating current (AC), where the flow periodically reverses direction. In a circuit, current is driven by a voltage difference, which pushes electrons through the conductor. The relationship between current, voltage, and resistance is described by Ohm's Law, which states that current equals voltage divided by resistance. Understanding current is crucial for working with electrical systems and electronics.