在高中物理课本(甲种本)第二册第六章电场中有一道练习题,即课本的第一百十八页练习一的第一题,原题是:把支在绝缘座上的不带电的导体A移近带电体B,用手指接触一下A,然后移开手指,握住绝缘座移开导体A,导体A就带电了。如果带电体B原来带正电,导体A将带什么电?做这个实验并作出解释。实验时可用验电器来检查导体A是否带电和带什么电。在全日制十年制学校高中物理课本(试用本)下册中也有此题,中学生对此题的解答,有的根本不能解答,有的则死记结论,总的表现是不甚理解。这从平时的作业、测验里可以反映出来,它的得分率一般都很低。有些人的解答是这样的:“当带电体B接近绝缘导体A时(见附图),产 There is a practice problem in the electric field of the second volume of the high school physics textbook (A type of textbook), which is the first question of Exercise One on the 180th page of the textbook. The original question is: The charged conductor A moves closer to the charged body B, touches A with the finger, then removes the finger, and removes the conductor A by holding it, and the conductor A is charged. If electrified body B is originally positively charged, what will be the electrical conductor A? Do this experiment and explain. An electroscope can be used during the experiment to check whether conductor A is energized or not. In the second volume of the full-time 10-year high school physics textbook (trial paper), this question was also answered. Some students’ answers to this question can not be answered at all, while others can only remember the conclusion and the overall performance is not well understood. This can be reflected from the usual homework and tests. Its score rate is generally very low. Some people’s answers are like this: ”When the electrified body B approaches the insulated conductor A (see the attached drawing),