A free app for Android, by Abdelaziz Sebrou.

This application is a free and complete electrical tutorial for beginners. It is very easy to learn about electricity and how electric circuits work. The most important thing in a circuit is the voltage, and the second most important thing is the current. Both of these need to be taken into consideration when designing an electric circuit. It is a very good idea to know the basic concepts of electricity, such as voltage and current, in order to design electric circuits.

The first thing you need to know is that electricity is a form of energy. What does that mean? It means that electricity is used to make other forms of energy.