一、用途 演示弹簧各线圈中同向电流间的相互作用。 二、结构 如图所示,拿一根玻璃试管,底部用喷灯烧软,插入一段电极,为了防止有漏洞,最好底部注入少许万能胶封牢;弹簧上端穿过橡皮塞作为另一电极,把弹簧放入试管中,橡皮塞轻轻塞入管口,弹簧便竖直悬挂在管中。 I. Purpose Demonstrate the interaction between the same current in each spring coil. Second, the structure as shown in the figure, take a glass test tube, the bottom with a torch burning soft, insert a section of the electrode, in order to prevent loopholes, it is best injected at the bottom of a little adhesive seal; the upper end of the spring through the rubber plug as another electrode, Put the spring into the test tube, the rubber plug gently plugs into the nozzle, and the spring will hang vertically in the tube.