[Jarvamundo (Alex)]

Might i suggest looking into lenz' law... it has to do with the resistance of change of magnetic flux or "opposing change".

"An induced current is always in such a direction as to oppose the motion or change causing it"

(sorry took me a bit to recall... wasnt sitting right with me... direction is also covered here... hope this helps )

but yeah from there we are getting down to physical characteristics of our universe, use ya left you get the force on ya thumb, use your right you get the current etc. but this resistance to change is the whole reason we are here, conservation of energy etc... otherwise it would be a runaway...