一.科谐振动的图线演示实验 1.用磁单摆演示简谐振动图线 a.工作原理: 原理图如图1所示,对应实物图如图2所示。当磁单摆在摆动时,磁铁周围的磁场与线圈发生相对运动,因而在线圈中产生感生电动势与感生电流,由于单摆上磁钢运动的速度是按v=v_0cos(wt+φ)方式变化,则在线圈中产生的电动势将按同样方式作变化、那么示波器上可以看到一条很清 A. The diagram of the harmonic vibration of the demonstration experiment 1. Using a simple magnetic pendulum to demonstrate the harmonic vibration diagram a. Working principle: The schematic diagram is shown in Figure 1, and the corresponding physical map is shown in Figure 2. When the magnetic pendulum swings, the magnetic field around the magnet and the coils move relative to each other, so that induced electromotive force and induced current are generated in the coil. Since the speed of the magnetic motion of the pendulum is v=v_0cos(wt+φ) If the mode is changed, the electromotive force generated in the coil will be changed in the same way, so the oscilloscope can see a very clear