Geektastic Link Of The Day

Found on Slashdot, this is a link to a blog that has links to all sorts of math and physics lecture videos that various universities have made available on the Web.

Just looking at it makes me all tingly...

Premise #1

If a bar magnet is oriented near a current-carrying wire so that the magnet's field lines cross perpendicularly to the direction that the current is flowing, and they are motionless relative to each other, the magnet will experience a net force of zero from the current in the wire.

(feel free to present examples to the contrary--if this statement is incorrect, I'd rather find out sooner than later ;)

[Technically, I think that the net force is still zero even if the magnet is moving relative to the wire as long as its distance from the wire remains constant and the magnetic field lines remain perpendicular to the wire. However, this should not strictly be necessary for this project, so it's more a point of trivia than anything really pertinent]

Premise #2 (as demonstrated by Michael Faraday)

If a conductive material is moved through a magnetic field in a direction perpendicular to the lines of said magnetic field, an EMF will be generated within the conductive material. The EMF will be proportional to the speed at which it is traveling and the strength of the field. The EMF will be at right angles to both the direction in which it is traveling and the lines of the field.

This will occur regardless of whether the source of the magnetic field is in motion relative to the conductive material or not.

(Again, disagreements are welcome, though it might be tricky to discuss in depth without something to draw pictures diagrams on...)

EDIT: As reedrover pointed out below, I failed to clarify one small but very crucial detail: in both cases the conductive material is in motion relative to the observer.