The network has  C¢ and C4
connected in parallel Thus, the equivalent capacitance C of the
network is
C = C¢ + C4 = 10
3
+10


  mF =13 3mF
(b) Clearly, from the figure, the charge on each of the capacitors, C1,
C2 and C3 is the same, say Q Let the charge on C4 be Q¢