|Physics Dept. Demonstration Manual|
To show induction of current in a conductor moving in a magnetic field.
The overhead projection galvanometer is connected in series
with the swinging conductor. This conductor is suspended vertically between
the poles of a U-shaped permanent magnet. When the conductor is moved
through the poles of the magnet, cutting the magnetic field in one direction,
this causes the pointer on the galvanometer to move to one side. When
the conductor is moved back through magnetic field, the pointer will move
in the opposite direction with the same magnitude.
Scale deflection is small, due to the passing through the magnetic field of only one (1) conductor, as opposed to a multi-turns solenoid or coil.