I'm a first year undergraduate student in UK and i gotta make a poster which will be about a future car. I thought about magnetic cars but i need some advise on how the whole thing will work. I mean i thought about making the cars out of iron and use permanent magnets as roads but that's not a really good idea. How about electromagnets? How can I put all that theory about induced emf into practice for this assignment can you please explain in detail how it can work?