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“磁场对通电直导体作用”演示器的取材和制作简单,结构合理,性能稳定可靠,取放和实验操作极为简便。本教具采用双层导轨并联连接,2根直导体上下排放,能同时同向或相向运动,对比度高,弥补了单轨单根直导体做实验时难以激发学生探究兴趣的不足。由于采用旋转磁体,可使磁场方向与电流方向构成任意夹角,改变了以往演示中只能使磁场方向与电流方向垂直的单一状况。
“Magnetic field effect on the direct current conductor” The demonstrator’s drawing and production is simple, the structure is reasonable, the performance is stable and reliable, pick and place and experimental operation is extremely simple. The teaching aids are connected in parallel by double guide rails, and two straight conductors are discharged upward and downward, which can move in the same direction or in opposite directions at the same time. The contrast ratio is high, which makes up for the insufficiency of students’ interest in exploring the single straight conductors. Due to the use of rotating magnets, it is possible to make the magnetic field direction and the current direction form an arbitrary angle, which changed the single condition in which the direction of the magnetic field and the direction of the current can only be perpendicular in the previous demonstration.