If $V_1$ and $V_2$ are potentials of points $A$ and $B$ respectively then ratio of the charge on capacitor $C_1$ and $C_2$ is $\left(V_1\ne V_2\right)$

Five capacitors are connected as shown in the diagram. Calculate equivalent capacitance between the points $x$ and $y$.

Three isolated equal charges are placed at the three corners of an equilateral triangle as shown in figure. The statement which is true for net electric potential $\mathrm{V}$ and net electric field intensity $\mathrm{E}$ at the centre of the triangle is