Six charges are kept at the vertices of a regular hexagon, as shown in the figure.

The magnitude of force applied by $+Q$ charge on $+q$ charge is $F.$ If the net electric force on $+Q$ charge is $nF$, then find the value of $n.$

Four charges are placed at the circumference of a dial clock as shown in the figure. If the clock has only hour hand and a charge $q_0$ is placed at the center, then the hour hand points in the direction which shows the time as

For the given figure, if $F_1$ is force on $q_1$ due to $q_2$ and $F_2$ is force on $q_1$ due to $q_3,$ then find $\frac{F_1}{F_2}.$