일반물리학 2 — Capacitance: Problem 13

13 A 2.0 \(\mu\)F capacitor and a 4.0 \(\mu\)F capacitor are connected in parallel across a 300 V potential difference. (a) What is the total energy stored by them? (b) They are next connected in series across that potential difference. What is the ratio of the total energy stored by them in the parallel arrangement to that in the series arrangement?