In the Goblet of Fire, Hermione says:
All those substitutes for magic Muggles use – electricity, and computers and radar, and all those things – they all go haywire around Hogwarts, there’s too much magic in the air.'
Goblet of Fire - pages 475-476 - Bloomsbury - chapter 28, The Madness of Mr Crouch
But it is impossible for electricity not to work. If electricity didn't work then:
Well, the universe literally would not exist as we know it, because electricity is streams of electrons, and without electrons, compounds (and thus most matter) wouldn't exist. If electricity (electromagnetism) did not exist the universe would not exist, since EM forces are an integral component of the (commonly accepted) standard model.
Besides is it just me or our brains work on basis of sending electrical impulses through neurons?
So how can electricity - and I don't mean electronics, but basic electricity - not work?