This is multifunctional demonstrator electric machinery, it can be used to do left-hand rule, right-hand rule, DC motor and the structure and working principle of AC/DC generator experiment. This demonstrator is novel in design and simple in structure. It use upright armature structure, the visibility is great, easy to be understood.
The light of lamp and arrows indicate the directions of current. Because it adopts a strong permanent magnet as a magnetic pole and a dry battery as power supply it can meet the requirements of the rural teachers.