高中物理(教科版)3-2第一章第6节的教学内容是自感,教材对通电自感和断电自感现象的分析是这样的:如图1所示为通电自感电路,当合上开关K后,D1立刻发光,D2不立刻发光,而是延时一段时间才发光。这是因为电路接通后通过L的电流增大,穿过L的磁通量增加,由于L的自感作用,L产生的感应电流要阻碍原电流的增加,因此流过D2的电流(相对D1)是慢慢增加,而流过D1的电流立 High School Physics (Teaching Edition) 3-2 Chapter VI teaching content is self-inductance, teaching materials on the power of self-inductance and power failure phenomenon is like this: as shown in Figure 1 for the power of self-inductance circuit, When closing the switch K, D1 immediately light, D2 does not immediately light, but delayed for some time before light. This is because the current through L increases when the circuit is switched on and the flux through L increases. Due to the self inductance of L, the induced current generated by L obstructs the increase of the primary current, so the current flowing through D2 (relative to D1) Is slowly increased, while the flow through the D1 legislation