Problem 3.115

Find the potential difference between points $A$ and $B$ of the system shown in Fig. 3.19 if the emf is equal to $\mathscr{E}=110 \mathrm{~V}$ and the capacitance ratio $C_{2} / C_{1}=\eta=2.0$ .

U=\mathscr{E} /\left(1+3 \eta+\eta^{2}\right)=10 \quad \mathrm{~V}

Electric Capacitance, Energy of an Electric Field