江苏省高考物理试卷中连续几年出现电感电容问题,学生对此类问题做起来总是感觉很棘手。因此,我们在平时的物理教学和高三复习中都要加强对这方面问题的研究。实际上,在电工学中的换路定律对解决此类问题十分有效。1换路定律换路定律的内容:换路瞬间,电容两端的电压u_c不能跃变,流过电感的电流五不能跃变,这即为 Jiangsu Province college entrance examination physics papers appear for several years inductance capacitance problems, students always feel it difficult to do such problems. Therefore, we should strengthen the research on this issue in both the usual physics teaching and the senior high school review. In fact, the law of circuit change in electrotechnics is very effective in solving such problems. 1 law of the law of the circuit-changing law: the moment of the circuit change, the voltage across the capacitor u_c can not change, the current flowing through the inductor can not jump five, which is