Electric current is the rate of flow of electric charge. The SI Unit of electric current is the Ampere, which is equal to a flow of one coulomb per second. Electric current can be either direct or alternating. Direct Current (DC) flows in one direction only, while Alternating Current (AC) changes direction periodically.
Electric currents are used in various applications, including power generation, electrical wiring, and electronic devices. Chemical reactions, solar panels, or wind turbines can generate current. It can also be generated by mechanical means such as generators or dynamos. Electrical wiring uses electric currents to carry signals between different circuit parts. Electronic devices use electric currents to perform various functions such as amplification, rectification, and oscillation.