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一位作家曾说过:“人生关键的就那么几步”,我们的教学也如此.一节课成败如何,就看几个环节处理得怎样.作为洛仑兹力知识的典型应用——磁偏转问题,现对其教学的处理方法谈点管窥之见,敬请斧正. 1.强化运动特点 解决磁偏转问题的首要任务是,弄清知识的纵向联系,通过分析此现象的产生原因及其运动特点,理顺知识脉络,使知识系统全面,连续贯通;使教学循序进行,步步为营。 众所周知,带电粒子垂直进入匀强磁场,只受洛仑兹力作用,并用磁场区域“足够大”时,粒子在磁场中将做完整的匀速圆周运动,然而,当磁场区域“有界”时一般情况就出现所谓的磁偏转现象了,可见,粒子的运
A writer once said: “The key to life is just a few steps.” Our teaching is also like this. How one class succeeds or fails depends on how well the process is handled. As a typical application of Lorentz force knowledge—magnetic The problem of deflection is now discussed in terms of teaching methods. Please request Axe. 1. Strengthen the characteristics of the movement The primary task of solving the problem of magnetic deflection is to clarify the vertical relationship of knowledge and analyze the causes of this phenomenon. The characteristics of sports, streamline the context of knowledge, so that a comprehensive and continuous knowledge system, so that teaching is carried out in order, step by step. It is well-known that charged particles pass vertically into a uniform magnetic field and are only subjected to the Lorentz force. When the magnetic field is “large enough”, the particles will make a complete uniform circular motion in the magnetic field. However, when the magnetic field is “bounded” The phenomenon of so-called magnetic deflection occurs. It can be seen that the particles are transported.