普通高中物理教材(人民教育出版社)选修3-1第94页第3题,笔者认为教师用书的解释存在疑问,以致我们在平时的测试中,对一些问题形成不同的理解,希望和大家共同探讨.原题.图1所示为电流天平,可以用来测量匀强磁场的磁感应强度,它的右臂挂着矩形线圈,匝数为n,线圈的水平边长为L,处 Ordinary High School Physics Textbook (People’s Education Press) Elective 3-1 第 94 页 第 3 题, I believe there is a doubt in the interpretation of the teacher’s book, so that we usually have a different understanding of some issues in the usual tests and hope to share with everyone Figure 1 shows the current balance can be used to measure the magnetic flux density uniform magnetic field, its right arm hung with a rectangular coil, the number of turns n, the horizontal length of the coil L, Department