Is there a positive charge EMP? Can electricity be contained?

I was watching V for Vendetta and there was this bomb on a digital timer which is ofcourse a turrible* idea but it made me wonder if you couldn’t disarm it by pulling all the electrons out of there.

Now if a regular EMP wouldn’t set off the bomb this doesn’t fit so I’d like to know that too. Anyway, you’ll probably need more than a short burst to fight the generator/battery but I don’t even know if you can build up a positive charge like a negative one.

*watch the cleveland show, I’m only pluggin it because it’s hilarious (most of the time)