Electromagnetism demonstration teaching aid

The utility model relates to an electromagnetism demonstration teaching aid, including magnetic iron box and metal rod, its characterized in that, magnetic iron box is the uncovered cuboid, the last dead lever that is equipped with of magnetic iron box, dead lever one end is the stiff end, rotates and connects on magnetic iron box, and the other end is the free end, and be equipped with the son and detain, magnetic iron box is last to be equipped with corresponding box, magnetic iron box divide into N utmost point magnetic iron box and S utmost point magnetic iron box, the inside N utmost point magnet outwards that is equipped with of N utmost point magnetic iron box, no. One the magnet both sides are equipped with electrically conductive frame, electrically conductive rest base portion isconnected with the wire, N utmost point magnetic iron box lateral wall is equipped with the round hole, N utmost point magnetic iron box front side is equipped with the battery case, the inside S utmost point no. Two magnet