6. Wheatstone bride combination: Calculate equivalent capacitance between points A and B.
If the ratio of capacitors C1 and C2 is same to the ratio of capacitors C3 and C4 then no charge pass through capacitor C5. So, the capacitors C1, C2 and C3, C4 are in series connection and their combinations are in parallel connection between points A and B.
If C1 = C2 = C3 = C4 = C then Ceq = C.