The diagram shows four 6- µF capacitors. The capacitance between points a and b is:

Explanation

When capacitors are connected in series, the equivalent capacitance Ceq is given by: 1/ Ceq = 1/C1 + 1/C2 + ... + 1/Cn1/C eq =1/6 + 1/6 = 2/6 =1/3So, the equivalent capacitance for the 2 pairs of capacitors in series isCeq = 3µF (for each pair of capacitors.)When capacitors are connected in parallel, the total or equivalent capacitance Ceq is the sum of the individual capacitances. Mathematically, it is given by: Ceq = C1 + C2 + ... + CnSo, the total equivalent capacitance for the 2 pairs of capacitors that are parallel isC total eq = 3+3 =6 µF