The "Voltage Law," also known as Kirchhoff's Voltage Law (KVL), states that the sum of the electrical potential differences (voltages) around any closed loop in a circuit is equal to zero. This means that the total voltage supplied by sources, like batteries, must equal the total voltage drops across components, such as resistors and capacitors, within that loop. In practical terms, KVL helps engineers and electricians analyze and design electrical circuits. By applying this law, they can ensure that all components receive the correct voltage, leading to efficient and safe operation of devices and systems in various applications, from simple circuits to complex electronics.