magnetic propulsion

Captain Slow IRL

Hi,
Does increasing currant or voltage through an electro magnet increase the power of that magnet?
Also, how strong (or what size) would an electro magnet have to be to move a regular magnet, with 100kg attached, 6 inches in an upward motion? Would this be possible without resorting to super-conductors?
Thanks in advance....:)

Michael Collins

land9 wrote:

Hi,
Does increasing currant or voltage through an electro magnet increase the power of that magnet?

The current yes.

Also, how strong (or what size) would an electro magnet have to be to move a regular magnet, with 100kg attached, 6 inches in an upward motion? Would this be possible without resorting to super-conductors?

The first part would require some calculations and more info such as what material you'd be using for the core. Just by looking at what you want I'd say it's possible with an electromagnet but not easy...

Capt'n Midnight

You must have seen the electro magnets they use in scrapyards on films, they can lift may tonnes, so 100Kg is a sinch.

The field density is proportional to the current - and the number of turn of wire - so the only effect that changing the voltage has is by changing the amount of current.

Do you mean attract it from 6 inches away ? if so you would need a big one. The Russians had a 35,000 tonne one for a particle accelerator, should work.


http://en.wikipedia.org/wiki/Electromagnet for info on the force

Captain Slow IRL

I can't give figures just yet, I'll try get them tomorrow.
Can an electro-magnet field be considered unsafe for humans?

Capt'n Midnight

static magnetic fields seem to have no detrimental effect
http://www.hfml.ru.nl/froglev.html

not recommended if you have metal fillings or artificial hips

kowloon

Or a pacemaker, insulin pump etc.