矩形线圈通过匀强磁场类问题涉及到的知识点多、灵活性强,是电磁感应与动力学、功和能结合最紧密,综合性最强问题之一,在高三大型考试中,经常在压轴题中出现。现对这类问题的考察细节讨论和例析如下:问题模型:如图1,矩形线圈底边长为a,高为b,距匀强磁场上边界h处自由下落,线圈的质量为m,总电阻为R,磁感应强度为B。 Rectangular coil through uniform magnetic field class issues related to the knowledge of more flexible and strong, is the combination of electromagnetic induction and dynamics, power and energy can be the most closely integrated one of the strongest problems in the three major exams, often in the finale The question appears. Now examine the details of such issues are discussed and analyzed as follows: Problem model: Figure 1, rectangular base length of the bottom of a, high b, from the uniform magnetic field at the upper boundary of the free fall h, the coil mass m, The total resistance R, magnetic induction B.