Joule's Law - Heating Effect of Electric Current

Joule's Law quantifies the heating effect produced by an electric current flowing through a resistor. According to this law, the heat energy (H) generated in a resistor due to the current (I) is directly proportional to the square of the current, the electrical resistance (R), and the time (t) the current flows. Mathematically, it is expressed as H = I²Rt where heat energy is measured in joules when current is in amperes, resistance in ohms, and time in seconds. This relationship is crucial in electrical heating and is used in devices like electric heaters, light bulbs, and fuses.