An electrical circuit is a closed loop that allows electric current to flow. It consists of various components, such as resistors, capacitors, and wires, which work together to perform specific functions. The flow of electricity is driven by a power source, like a battery or a generator, providing the necessary voltage. In a basic circuit, when the circuit is complete, electricity can travel from the power source through the components and back, creating a continuous flow. This flow can power devices like light bulbs or motors, enabling them to operate. Understanding circuits is fundamental in electronics and electrical engineering.