如图所示电路，各个电容器的初始电压均为零， 例: 如图所示电路，各个电容器的初始电压均为零， 试求ab间的等 给定 C1 = 1F , C2 = 2 F , C3 = 3F , C4 = 4 F试求 间的等 值电容C 值电容 C4 C1 a 解：C = C1C2 = 1× 2 = 2 F 12
C1 + C2
1+ 2
3
C3 b
C2
2 11 ′ C3 = C12 + C3 = + 3 = F 3 3ab间等值电容为 间等值电容为
11 4× ′ C 4 C3 3 = 1.913F Cab = = ′ C4 + C3 4 + 11 3