在电磁感应中,导体棒做切割磁感线的运动是一个综合性很强的问题,涉及的物理知识和规律较多,过程复杂,解答此类问题的关键是:首先要弄清导体棒运动的终极状态,其次是选择恰当的方法和正确的规律列方程求解。若能正确分析导体棒在运动过程中的动态变化,列出导体棒加速度的表达式,就能推断出导体棒稳定时的隐含条件。稳定不等于平衡,这一终态可能是静止,也可能是匀速运动,还 In the electromagnetic induction, the movement of the conductor bar to cut the magnetic induction line is a very comprehensive issue involving more physical knowledge and laws and complex processes. The key to solving such problems is to first understand the movement of the conductor bar The ultimate state, followed by the choice of the right method and the correct law of column equations. If we can correctly analyze the dynamic changes of the conductor bar during the movement, we can infer the implied conditions when the conductor bar is stable by formulating the expression of the acceleration of the conductor bar. Stable is not equal to the balance, the final state may be static, it may be uniform motion, also