Equivalent capacitance in series combination (C’) is given by
1
C′
=
1
C1
+
1
C2
⇒C′=
C1C2
C1+C2
For parallel combination equivalent capacitance C"=C1+C2 For parallel combination q=10(C1+C2) q1=500µC 500=10(C1+C2) C1+C2=50µF ....(i) For Series Combination– q2=10
C1C2
(C1+C2)
80=10
C1C2
50
From equation ....(ii) C1C2=400 ........(iii) From equation (i) and (ii) C1=10µFC2=40µF