Induced current

[Jdo300]

Hello All,

I have a question regarding induced EMF in a wire via a magnetic field. Check out the attached drawing to see my specific situation. If I have a piece of wire with length L and a magnetic field (from, say, a permanent magnet), moving along the length of wire with velocity V, how do I calculate the amount of emf produced in the wire? I'm trying to come up with a formula to calculate the emf if I know the length of the wire segment, the strength of the B field, and the speed at which it is moving along the wire. To give the field itself some dimension, I suppose I could denote the width of the field exposed to the wire as W.

Thanks,
Jason O

[berkeman]

The figure isn't making sense to me yet. The wire and the B field are parallel? I don't think you'll induce any EMF in that geometry. The electrons in the wire need to move perpendicular to the B field in order for EMF to be generated. F = qv x B