Question

The total energy stored in the condenser system shown in the figure will be

• A. $2\mu J$
• B. $4\mu J$
• C. $8\mu J$
• D. $16\mu J$

Answer 1

The correct option is C $8\mu J$

capacitor 6 and 3 are in series

$\frac{1}{C}=\frac{1}{6}+\frac{1}{3}\to C=2$

$C_r=2+2=4$

$E=\frac{C_r{V}^2}{2}=8\mu J$