You can readily measure voltage and current in a circuit using a multimeter or an oscilloscope. This is a useful definition for electronics. Where energy is measured in joules and time is measured in seconds.ġ volt applied to a circuit at 1 ampere for 1 second gives 1 joule. The definition I am going to use is the following: All are equivalent, but some are more useful than others. Wikipedia has a lot of variations in the definition. Maybe that will help someone else comprehend electrical energy - hopefully without adding extra confusion.Įlectrical energy is measured in joules. After that I’m going to break it apart and use tangible things to explain the pieces so that the abtract “energy” has a visible referent. To start with, I’m going to give a definition of electrical energy. I’m going to use play-doh to make a tangible model of electrical energy. I’ve remarked before that I find it easier to understand abstract things if I can somehow make them more concrete. The thing about electrical energy is that you don’t have anything tangible to equate to work or energy as in the classical mechanical physics experiments.
Clever folks realize that there’s something wrong and ask what they are missing because they doubt that those laws would be as easy to break as their simple, obvious circuit suggests. The naive beginner assumes that the circuit is somehow an exception to the law of convervation of energy or the three laws of thermodynamics.
The usual form this takes is someone who has discovered a way to get a higher voltage out of a circuit than the circuit was supplied with. The Electrical Engineering Stack Exchange often gets questions from beginners that basically amount to confusion about just what electrical energy is. Visualizing the invisible with a child’s toy.
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