Electric current is the flow of electric charge, typically carried by electrons in a conductor such as a wire. It is measured in amperes (A) and can be either direct current (DC), where the flow is in one direction, or alternating current (AC), where the flow changes direction periodically. Current is essential for powering devices like light bulbs, computers, and appliances. It is generated by sources such as batteries and power plants, and it travels through circuits, which are closed loops that allow the current to flow continuously.