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高中《物理(必修加选修)》。第二册第十五章第一节“做一做”中提出了“怎样用铁屑显示通电直导线和环形线圈的磁感线形状”的演示实验。由于实验室很少有做这个实验的现成仪器,所以笔者就地取材的完成了这个实验,现就“用铁屑显示通电直导线的磁感线形状”实验中遇到的问题及其解决方案提出来供大家商讨。一、实验器材的选择 1、从农具厂找来废铁屑 2、新干电池1节 3、量程为3A的电流表一只 4、中间有孔的木板一块 5、电键一只 6、直径为0.6mm的漆包铜导线若干米
High school “Physics (Compulsory plus optional)”. The fifteenth chapter of the second volume of the fifteenth chapter “do one done” proposed a “how to use iron filings to show the magnetic induction line shape of the power straight wire and loop coil” demonstration experiment. Since there are few ready-made instruments for this experiment in the laboratory, the author completed the experiment on the basis of the material. Now he uses “iron filings to show the shape of the magnetic induction lines of the straight current conductors” and the problems encountered in the experiment. The solution was proposed for discussion. First, the choice of experimental equipment 1, from the farm tool to find scrap iron 2, a new dry battery 1 section 3, a range of 3A ammeter a 4, a hole in the middle of a wooden board 5, a key 6, a diameter of 0.6mm Enamelled copper wire some meters