What is the formula for calculating electrical power?

The formula for calculating electrical power is represented as P = V × I, where P is power measured in watts, V is voltage in volts, and I is current in amperes. This equation reflects the relationship between voltage, current, and power in an electrical circuit.

When voltage is applied to a conductor, it causes a flow of current. The power consumed by the electrical device is directly proportional to both the voltage across the device and the current flowing through it. This relationship is fundamental in electrical theory and is widely applied in various electrical calculations, making it crucial for electricians to understand and utilize.

Knowledge of this formula enables professionals to calculate the power requirements for systems and devices, assess the efficiency of electrical systems, and ensure safe and effective installation practices. Understanding this relationship is essential for designing circuits and for effective troubleshooting in electrical systems.