whether electricity that comes in our home comes directly after generated or first stored and then distributed Please give answer that, whether electricity in our home comes directly after it is generated e.g. at a dam or nuclear plant or first it is stored somewhere and then distributed as it is needed.
 A: We can store electricity directly, only  in a system with a decent amount of capacitance. i.e.  in capacitors. Hoever, in general, electricity grids have next-to-no capacitance; so the electricity comes straight from the generator to you.
There are lots of ways to store electricity indirectly, and on electricity grids, that's almost exclusively done by pumped hydro storage. And because it's indirect, whether hydro or battery or whatever, the electricity you use has still been generated a moment before it reaches you, whether at a hydro plant (where it is converted from gravitational potential), or at a battery (where it is converted from chemical energy), or whatever.
A: There are some ways to store energy - http://en.wikipedia.org/wiki/Grid_energy_storage ; hydro storage was mentioned here, but theoretically it is also possible to store energy using flywheels - http://www.beaconpower.com/ (but  that specific company went bust:-)).
A: Storage of electricity per se can only happen with batteries. The electricity consumed in the towns villages and cities, megawatts, is so large that even considering batteries is ludicrous.
Electricity comes directly at practically the speed of light from the generators to the houses. 
