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Re: Induction and moving rod on a U-shaped conductor



I like to visualize the electric field in a moving conductor as a smooth
gradient which will support a current if connected to a stationary return
path, but which will exhibit the field regardless (i.e. beyond the 'rails'
the field in the rod survives...)
I am uncomfortable with the conceptual model of electrons or charge
'piling up'. The force due to a very minor difference in electron
density is considerable.
Brian

At 11:35 11/19/97 +0200, you wrote:
When a conducting rod is moving in a uniform magnetic field (rod, magnetic
field, velocity mutually perpendicular) charge accumulation establish at the
ends of the rod. If the rod slides along a stationary U-shaped conductor, an
induced current is established around the circuit.

My question is about the motion of the electrons of the U-shaped conductor
when these electrons reach the moving rod: Do the electrons from the U-shaped
conductor go inside the rod?

An excellent analysis about the motion of electrons has been made by
Young-Freedman (University Physics- ninth edition pg. 953) But they don' t
mention what happens if the electrons of U-shaped conductor reach the moving
rod.

I have another question about the electrons' motion in the U-shaped
conductor and rod. Suppose that the rod has big length, bigger than the
opening of the U-shaped conductor so its ends exceed the U-shaped
conductor. What happens with the electrons? Do they accumulate at the point
of the rod, where the rod meets tha U-shaped conductor? If so, why does this
happen? Don't forget that the whole rod is inside a uniform magnetic
field....

Thank you


George Panagiotakopoulos -

brian whatcott <inet@intellisys.net>
Altus OK