What is the basic unit of electrical power?

The watt is the fundamental unit used to measure electrical power, named after the Scottish inventor James Watt. It quantifies the rate of energy transfer in a circuit, calculated by multiplying voltage by current (P = E x I). The distractor units measure entirely different electrical properties. The ampere measures current (the flow of electrons), the volt measures electromotive force or potential difference (the pressure), and the ohm measures resistance (the opposition to current flow).