In which units is electrical power measured?

Electrical power is measured in watts. The watt is a derived unit that quantifies the rate of energy transfer. It is defined as one joule per second and can be calculated using the formula: power (in watts) equals voltage (in volts) multiplied by current (in amperes). This relationship highlights the interconnectedness of voltage and current in determining the amount of power consumed or generated in an electrical circuit.

Understanding that power represents the rate at which energy is used or produced is fundamental in electrical engineering and various applications, such as sizing electrical components or determining energy efficiency. Wattage is vital not only in practical scenarios for appliances but also in theoretical applications concerning electrical safety and performance standards.