Find out the total capacitance:
Find out the total capacitance of 3µF, 6µF, and 12µF capacitors connected in series (Figure).
1/CT =1/C1 +1/C2 +1/C3
= 1/3 +1/6 +1/12
=4/12+ 2/12+ 1/12
=7/12
CT =12/7 =1.7 µ f
Figure Example - Capacitors Connected in Series