MOTIONAL EMF
The figure below shows a conducting wire of length ℓ, moving with constant
velocity v in the plane of the page through a uniform magnetic field B that’s
perpendicular to the page. The magnetic field exerts a force on the moving
conduction electrons in the wire. Using the right-hand rule, the direction of the
magnetic force, FB, on these electrons (which are negatively charged) is
downward.
As a result, electrons will be pushed to the lower end of the wire, which will leave
an excess of positive charge at its upper end. This separation of charge creates a
uniform electric field, E, within the wire, pointing downward.
Always Be Right!
Remember your right-hand
rules; you may need to use
a combination of both in
order to find the direction
of the current. Just pay
close attention to the orientation