A network of four 10 µF capacitors is connected to a 500 V supply, as shown in the figure. The equivalent capacitance of the network is:

$1. \frac{10}{3}\mu F$
$2. \frac{20}{3}\mu F$
$3. \frac{40}{3}\mu F$
$4. \frac{16}{3}\mu F$

A network of four 10 µF capacitors is connected to a 500 V supply, as shown in the figure. The charge on the capacitor $\left(C_4\right)$ is: (Note, the charge on a capacitor is the charge on the plate with higher potential, equal and opposite to the charge on the plate with lower potential).

$1. 1.4\times {10}^{-3} C$
$2. 9\times {10}^{-4 }C$
$3. 1.7\times {10}^{-3} C$
$4. 5.0\times {10}^{-3} C$