安培力定量分析演示仪的改进

Improvement on the demonstration instrument for the quantitative analysis of Ampere force

对现有安培力演示仪进行了改进,利用可调直流电源改变电流的大小和方向,通过对调磁极可改变磁场的方向,通过移动磁极之间的距离可改变磁场的强弱,通过改变线圈抽头接线柱可改变通电导体的长度.利用该仪器可定量探究安培力的大小和方向与通电导体长度、电流的大小和方向以及磁场强度的关系.

In view of the deficiency of the existing ampere force demonstration instrument, an im- provement and innovation were carried out. In the new instrument, the strength and direction of the current were controlled through a DC power; the direction of the magnetic field was changed by exchanging the position of the magnetic pole, its strength was adjusted by adjusting the distance be- tween the poles; the electrified conductor length was controlled by changing the coil tap terminal. This instrument could be used to quantitatively investigate the factors affecting the Ampere force, that were the length of the electrified conductor, the size and direction of the current, and the strength the magnetic field. In addition, the magnet was placed on rotary chassis with angle indicator. With this chassis, the effect of the angle between the conductor and the magnetic field on the Ampere force be explored without moving the coil.