Have you ever wondered what would happen in you stuck a knife into a socket? Come on, don't be like that, I know you have thought about it, and really, who hasn't. Everyone always wants to do what they are told that they can't, and I am pretty sure everyone has been told not to put anything onto a wall outlet. But the real question is "why shouldn't I? I mean, what is the worst that can happen?" So starts a new segment I like to call "Bad Ideas."
Tom Bloom (c)
So why is it a bad idea to put a knife, or wet fingers or anything conductive into a wall socket, and what would happen if you did? Well, as we all know, there is electricity flowing through the wires in the wall, and when you plug something into the wall, to completes the connection or circuit and allows the electricity to power the appliance that is plugged in. The wires themselves, are essentially harmless until the circuit is complete. Electricity always wants to be grounded, and the human body is a good conductor of electricity due to us being mostly water sacks. That is why a bird can sit on a wire; there isn't enough voltage drop across their bodies and they are not connected to a ground source.
So if you stuck an un-insulated knife into a wall socket, you will complete the circuit, and essentially the electricity will flow through you and ground itself. Depending on where you are in the world will dictate how much is going to flow through you. If you are in North America, you will get 110V, 60Hz, whereas, in Europe, you will get 220V and 60Hz. You would feel a pulse going trough you at the same frequency of the electricity, around 60 pulses per second (which is a Hertz), and there could be serious injuries or even death. So long story short, it is a bad idea. For more information, check out
howstuffworks
Incidentally, it is possible, though not recommended, to stick a metal object into a socket and not get electrocuted so long as the handle of the object is well insulated. The insulation acts as a barrier to prevent electrical shock. That is why you can handle appliances that are plugged into the wall and not feel the wrath of the electrical current.
-d