1)The purpose of the Experiment A) To learn the relationship between the direction of the force bore by the live conductor in the magnetic field and the direction of magnetic induction line and the current B)To Learn the relationship between the direction of inductive current and the direction of magnetic induction line and the motion of the conductor when the conductor is on a cutting-lines of magnetic force motion. 2)Theories Investigated Left-hand rule : the effect on the live conductor by the magnetic force in the magnetic fields Right-hand rule :Phenomena of electromagnetic induction 3)Components base (with track , wiring terminal ) metal rolling bar U-shaped horseshoe magnet