论文部分内容阅读
动量是选修教材中3-5的主干知识点,在高考选做题中有举足轻重的地位.电磁学是高中物理的重要知识点之一,常以压轴题的形式出现,掌握好这两块知识是整个物理考试成功的关键.两者结合可以很好的考查这两方面的知识.下面举几个例子.1.求电荷量例1如图1所示.金属架平面与水平面平行,质量为m、长度为L的硬金属线ab的两端用绝缘线吊着并与框接触,处在匀强磁场中.当闭合开关S时,ab通电,随即摆起的高度为h,则在通电的瞬间,
Momentum is the main knowledge point in 3-5 of the elective textbooks. It plays a decisive role in college entrance examinations. Electromagnetism is one of the important knowledge points in high school physics. It often appears in the form of finale questions and masters these two pieces of knowledge. Is the key to the success of the entire physics exam. The combination of the two can be very good examination of these two aspects of knowledge. Here are a few examples. 1. Find the charge case 1 as shown in Figure 1. The metal frame plane and the horizontal plane, the quality of m, the length of the length of the hard metal wire ab is dangling with insulated wire and contact with the frame, in a uniform magnetic field. When the switch S is closed, ab power, immediately swing height h, then in the power Moments