Direct current (DC) is an electric current that flows in one direction only. Batteries and solar cells produce it, which powers electronic devices such as computers, phones, and lights.
DC electricity was first discovered in 1820 by Italian physicist Alessandro Volta. He found that when he connected two metals with a moistened paper, an electric current flowed between them. This discovery paved the way for the development of batteries and other DC power sources.
Today, DC electricity is still used extensively in electronic devices. It has many advantages over alternating current (AC), including its lower cost and more detailed circuitry requirements. Additionally, DC can be easily converted into other forms of energy, such as heat or light, making it very versatile.