“Electrical energy is a very useful form of energy because it can be converted into other forms of energy, including heat, sound, movement, and light. It can also be transferred from its source, such as a power station, to your home. Articles present general concepts regarding Alternating and Direct Current.”
- Transformer — power supply : Ac Circuits
- True, Reactive, and Apparent power : Power Factor
- http://kids.britannica.com/lm/animations/oaltern001d4/product.html
- http://www.diffen.com/difference/Alternating_Current_vs_Direct_Curren
- http://www.electrical4u.com/electrical-power-factor
- http://www.nist.gov/pml/div684/power_121509.cfm
- https://en.wikipedia.org/wiki/Paul_Boucherot
- http://ecmweb.com/lighting-amp-control/hidden-costs-cfls
- http://www.allaboutcircuits.com/textbook/alternating-current/chpt-13/introduction-ac-motors/
- HowStuffWorks “Direct Current Versus Alternating Current”
- AC vs DC (Alternating Current vs Direct Current) – Difference and Comparison | Diffen