Electric circuits are pathways that allow electric current to flow. They consist of a closed loop made up of conductive materials, such as wires, and components like resistors, capacitors, and switches.
Current is the rate at which electric charge flows through a conductor. It is measured in amperes (A) and represents the amount of charge passing through a point per unit time.
Voltage is the potential difference between two points in an electric circuit. It represents the energy per unit charge required to move charges from one point to another within the circuit.