Subject: How much power is supplied in a home socket

Looked in a book - that shows home power distribution is in parallel 

(in a house)
This not to disrrupt the other sockets when one is swtiched off.
If you look into a 3 bulb parallel circuit. When one bulb is taken off 

the circuit more power is give to the remaining two. doesn't this 

happen in a house's parallel circult.
I look at power in this perspective - battery gives out 3v constantly.
from this i assume one home socket gives out x amount of constant 

power.
But one can attach a lamb, television, video player, to one socket with 

an adaptor. How can so many devices draw enough power from one socket?
am i missing something in the picture - or this has to do with amps?

Re: How much power is supplied in a home socket