元件串并联计算公式 电阻串联：R = R1+R2
电阻并联：R = (R1*R2)/(R1+R2) 电容串联：C = (C1*C2)/(C1+C2)
电容并联：C = C1+C2 电感串联：L = L1+L2
电感并联：L = (L1*L2)/(L1+L2) 电源串联：电流不变，增大电压
电源并联：电压不变，增大电流