论文部分内容阅读
目前农村中学用无线电发射机演示电磁波的发射和接收,因限于条件,一时尚难做到。本着中学物理教学大纲精神,我们用了类似实验代替,即在教学中应用感应圈来演示,效果较好。一、实验器材: 感应圈一个(火花间隙为8厘米)。粗铁丝六根(直径约4毫米,长1.30米的一根;长1.00米的4根;长0.30米的1根)。氖灯管三个,两端各焊一根引出线。绝缘木座四个,中间钻一小孔,使铁丝能插入。半
At present, rural schools use radio transmitters to demonstrate the launch and reception of electromagnetic waves. Due to the limited conditions, it is difficult to achieve a fashion. In the spirit of the physics syllabus for secondary schools, we used a similar experiment instead of using induction circles in teaching to demonstrate that the effect is good. First, the experimental equipment: Induction ring one (spark gap is 8 cm). Six coarse wires (one with a diameter of about 4 mm and a length of 1.30 m; four with a length of 1.00 m; one with a length of 0.30 m). There are three lamps and one end of each end is welded. Insulated wooden seat four, a small hole drilled in the middle, so that the wire can be inserted. half