Four capacitors and a battery are connected as shown. The potential drop across the 7 μF capacitor is 6 V. Which statements are correct?
Select all that apply

Question

Four capacitors and a battery are connected as shown. The potential drop across the 7 μF capacitor is 6 V. Which statements are correct?

G1 Physics · Accepted Answer

The 7 μF and 3 μF capacitors are in series, so their common charge is 7×6=42 μC. Hence V₃=42/3=14 V. The parallel 3.9 μF branch therefore has 20 V, while charge/voltage balance with the 12 μF capacitor gives the battery emf 30 V and 12 μF drop 10 V. Thus B, C and D are correct.