The number of electric lines that emerge from a finite charge $+q$ is _____

Two capacitors of equal capacitance $\left(C_1=C_2\right)$ are shown in the figure. Initially, while the switch $S$ is open, one of the capacitors is uncharged and the other carries charge $Q_0.$ The energy stored in the charged capacitor is $U_0$. Sometimes after the switch is closed, the capacitors $C_1$ and $C_2$ carry charges $Q_1$ and $Q_2$, respectively, the voltage across the capacitors are $V_1$ and $V_2,$ and the energies stored in the capacitors are $U_1$ and $U_2.$ Which of the following statements is incorrect?