Electrical-study

What is Electricity  ? Electricity is form of invisible energy which constitutes the flow of electrons in a closed circuit to do the work. When electrons are flows through a closed circuit, they produce a invisible energy which are used nowadays to all most type of work. This invisible energy is known as electricity or electrical energy. There are different types of natural source of energy which are available in free in space and can be used to produce electrical energy. Name of these natural source of energy are 1. Water                               6. Sea Waves 2. Fuels                                7. Tides 3. Nuclear Energy                8.Biomass 4. Sun 5. Wind  These natural sources of energy are first converted into electrical energy and then electrical energy is used to do different types of useful work. Advantages of Electrical Energy Electrical energy is most used type of energy then the other type of natural source of energy due to

Electro-Magnetic Induction Electromagnetic induction is process by which when a conductor (which form a closed circuit) is placed in a changing magnetic field, an e.m.f is induced in that conductor by electro-magnetic induction. Let have a coil having large number of turns to which a galvanometer is connected. This coil is placed near to a permanent bar magnet. When this bar magnet is takes near to the coil or away from the coil, an e.m.f is induced in the circuit. Due to e.m.f induction needle of galvanometer start deflecting and result to induction of voltage and current in the coil. On the other hand, when Bar Magnet is kept at one place and coil having large number of turn takes near and away from the bar magnet, then also needle of galvanometer start deflecting and result to induction of voltage and current in the coil. The deflection of the needle is opposite in the two case. But if the bar magnet and coil kept stationary, no matter how much the flux link to the coil,

What is a Transformer? Transformer is a static device which is used to transfer a.c electrical power from one circuit to another circuit at same frequency but at different voltage levels. When voltage at the output side is more than the input side then it’s know as step up transformer and when the input voltage is more than the output voltage then it is known as step down voltage. Exp. if input voltage is V1 and output voltage is V2, if V1>V2 then it is Step up voltage and if V1<V2 then it’s a step down transformer.   In this case only voltage is change form one level to another level but frequency remains same.                                                                                   Transformer                                       If V1>V2 Step Up Transformer                                      If V1<V2 Step Down Transformer   Necessity of Transformer Usually in India voltage is generated at power station is at 11kV or 33k