To demonstrate the acting force that the wire got from magnetic field,a simple direct current motor is made.Put and rotate different coils in magnetic field,the acting forces from the magnetic field are demonstrated.

• 为了演示“磁场对通电导线的作用力”实验；设计了简易直流电动机.；该简易直流电动机是将绕成不同形状的导线放置在磁场中；通过线圈的旋转；即可演示磁场对通电导线的作用