Glossary page banner

Simple Definitions

The most important electronics terms, demystified in one place.


Video Tutorials:

New Video Tutorials:


Our Take

The unit of measurement of power. As power is the product of current and volt, watts are measured the same way. For example, 1 amp at 5 volts is 5 watts. Or 5 amps at 1 volt is 5 watts.

Book Definition

Unit of real power. Equal to I2R or VI cos θ.


The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second,[1] and is used to quantify the rate of energy transfer. In dimensional analysis, power is described by

{\displaystyle {\mathsf {M}}{\mathsf {L}}^{2}{\mathsf {T}}^{-3}}

Make Bread with our CircuitBread Toaster!

Get the latest tools and tutorials, fresh from the toaster.

What are you looking for?