Question

Two capacitors $C_{1}=2 \mu F$ and $C_{2}=6 \mu F$ in series, are connected in parallel to a third capacitor $C_{3}=4 \mu F$. This arrangement is then connected to a battery of e.m.f. = $2 V ,$ as shown in the figure. How much energy is given by the battery in charging the capacitors :

• A. $22 \times 10^{-6} J$
• B. $11 \times 10^{-6} J$
• C. $\frac{32}{3} \times 10^{-6} J$
• D. $\frac{16}{3} \times 10^{-6} J$

Answer 1

Answer: (A)

Energy supplied by battery $U = C _{\text {net }} V ^{2}$(double of stored energy)