What is the formula for calculating electrical power?

The formula for calculating electrical power is represented as P = V × I, where P stands for power measured in watts, V stands for voltage measured in volts, and I stands for current measured in amperes. This formula indicates that electrical power is the product of the voltage across a component or circuit and the current flowing through it.

To understand this better, consider that when a voltage is applied across a conductor, it causes an electric current to flow. The interaction between the voltage and the current determines the amount of power being used or generated in the system. This relationship is fundamental in both AC and DC circuits, making the formula universally applicable in various electrical applications.

In contrast, other formulas mentioned in the question are relevant for different calculations. For instance, P = I × R is used to calculate power in terms of current and resistance (which is derived from Ohm's law) and applies in situations where the voltage is not directly measured. P = V × R is not a standard formula for power calculation; instead, it relates voltage and resistance, leading to misunderstandings. P = I × V, while it looks similar to the correct formula, can often lead to confusion in terminology and units, as it misrepresents the proper relationship of