Black wire to copper screw, white wire to silver screw, bare copper ground wire to green ground screw.
Because it has electricity flowing to the outlet.
To light a light bulb you need to connect to a source of electricity like a battery or an electrical outlet.
Ring main
John Howard invented the electrical outlet in 1924. Prior to his invention lamp bulb plugs were used to connect various household appliances.
to many electrical cords plugged into one outlet
you need a transformer
A computer does not have a generator, it requires standard AC electrical current which is available in any electrical outlet throughout your home.
When was the first outlet made
A 15 amp 125 volt outlet is a household outlet.
You can plug the air conditioner into any outlet in your home, however you should get an outlet strip to protect against power surges. Yes, this HDTV plugs into a normal electrical outlet or power strip.
Turn off the fuse in your fuse box which that electrical outlet is connected to.
too many electrical cords plugged into one outlet