An electrical current is the flow of electric charge, typically carried by moving electrons in a conductor like a wire. This flow is driven by a difference in voltage, which pushes the electrons through the material. Electrical currents are measured in units called amperes (A), and they can be either direct current (DC), where the flow is constant, or alternating current (AC), where the flow changes direction periodically. Electrical currents are essential for powering devices and systems in our daily lives, from household appliances to large industrial machines. They enable the operation of light bulbs, computers, and electric vehicles, making modern technology possible. Understanding electrical currents is crucial for anyone working with or studying electronics and electrical engineering.