Electromagnet question

[fattestcat]

I was wondering if it is possible to pull a hail-size dent out of a car with an electromagnet. I have seen an electromagnet that is 1-3/4" diameter and can hold 700 lbs. Will this do anything or what?

[Tide]

You could probably do it if you could keep the magnet flush with the indentation. Otherwise, the holding power of just the edge of the magnet may not be adequate.

[bino]

did you try a plunger

[Gonzolo]

Some electromagnets can lift a car. We see it on TV and movies quite often. It is not the size that matters, but the current in the coil (although the bigger the electromagnet, the more wire you can loop around it, adding to current density)

[Gza]

It is not the size that matters, but the current in the coil

Try telling that to my girlfriend! :rofl: :rofl: :rofl: