Saturday, May 3, 2014

energy

julius:     " what is energy???"
prof:       "energy is something which is used to do some work,if u kick a bicycle and run some work is done ..that work is done by your legs....your legs pedal it by means of energy you can also say it as internal energy"
everything in the world has energy for example if you take a river it has flow of water which we call as  kinetic energy.for example take a stone...it may sound it doesn't have any energy but if it is dropped from a mountain it strikes with a higher force due to acceleration..
 julius:   ------    "                                                                      oh thats why windmills and pelton wheels are used to convert the moving energy into some current ...wait wait wait everything is ok
how conversion occurs ???                 
   prof:just like movement of water there is movement of electrons and the byproduct is CURRENT so that we need to produce change in magnetic field..this change is produce by the rotating armature connected to the shaft and the shaft rotaes by means of a turbine(pelton kaplan...or some others...)