The potential diffrence across a series combination of 4(micro)F and 12(micro)F capacitor is 240V. What is the potential diffrence across 4(micro)F capacitor?

Answer 1

The same charge is on both capicator.

C=qV

q=C/V

so you have 4/V4 = 12/V12
and V4+V12=240

solve for them. I get V12 is 3 times V4, or V12=180, V4=60

check all that.