Kirchhoff's laws describe how current and voltage behave in electrical circuits. The two laws are: 1. Kirchhoff's Current Law (KCL) states that the total current entering a node in a circuit equals the total current leaving it, expressing the conservation of electric charge. 2. Kirchhoff's Voltage Law (KVL) states that the sum of the voltages in any closed loop in a circuit is equal to zero, expressing the conservation of energy. The laws were first described by German physicist Gustav Kirchhoff in 1845 and are foundational to circuit theory. They allow analysis of currents and voltages in circuits.