Current electricity

             In the chapter of heat, you have studied that heat is a form of energy. The other forms of energy are lights,mechanical and chemical energy,etc. Among all forms of energy electricity and electric energy is the most useful and convenient for mankind. It can be converted to almost all forms of energy easily and can be stored and transmitted over long distances with little wastages.  Electric bulbs , Motors, all phones , air conditioners , heater , computers and heavy machinery all uses different effects of electric energy. In fact it is difficult to imagine our lives without electric energy.  The origin of electric energy lies in electric charges. The branch of physis which deals with the study of electric charges and their effects is called electricity.                                                   ...