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在电磁振荡过程中,随着电容器不断的充放电,与电场相联系的物理量和与磁场相联系的物理量都发生周期性的变化.由于涉及的物理量较多,物理过程较复杂,因而碰到此类问题时,学生觉得非常棘手.但若能抓住电容器充放电的特征,便会“柳暗花明”,快速解决与电磁振荡相关的问题.下面是笔者的一些见解,并举例说明.一、电容器和线圈在电路中的作用电磁振荡形成的原因是电容器的充放电及线圈的
In the process of electromagnetic oscillation, as the capacitor continues to charge and discharge, the physical quantity associated with the electric field and the physical quantity associated with the magnetic field all undergo periodic changes. Since there are many physical quantities involved and the physical process is more complex, we have encountered this. When students are concerned, they find it very tricky. However, if they can grasp the characteristics of the charge and discharge of the capacitors, they will “wispy views” and quickly solve problems related to electromagnetic oscillations. Here are some of the author’s opinions and examples. The role of the coil in the circuit The cause of the electromagnetic oscillation is the charge and discharge of the capacitor and the coil