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pattiecake
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Near the Earth's equator, the Earth's magnetic field is approximately horizontal. What current would have to flow through a long wire with a mass density of 10g/m to keep the wire floating in mid-air? What would be the direction of the wire, and the current in the wire?
Well, I know I'd need a very LARGE current. Not sure what equation to go with. Can anyone point me in the right direction?
Also I'm having trouble picturing how the Earth's magnetic field is horizontal. The field lines go in a circle, right?
http://liftoff.msfc.nasa.gov/academy/space/mag_field.html
Well, I know I'd need a very LARGE current. Not sure what equation to go with. Can anyone point me in the right direction?
Also I'm having trouble picturing how the Earth's magnetic field is horizontal. The field lines go in a circle, right?
http://liftoff.msfc.nasa.gov/academy/space/mag_field.html
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