The figure shows part of a complete circuit. The potential at point A is greater than that of B by 19 volts what is the potential difference in volts across the three microfarad capacitor?
All relevant to electric circuits
The Attempt at a Solution
From Kirchhoff's law, net potential difference across a closed loop should be 0. V(a)-(b)=19 V. Therefore, the net potential difference across given figure should be -19 V. I'm having trouble with the sign conventions related to this, since I don't know what sign to put with the batteries, otherwise since all capacitors are in series- charge across them is the same. I'd appreciate some insight.