Consider two identical small metal balls, one having a charge of $+2$ microcoulombs and the other having a charge of $+4$ microcoulombs. The balls are separated from each other by $25$ cm$.$ Each exerts a force F on the other. The balls are brought into momentary contact with each other $($assume each ball is on the end of its own non$-$conducting rod for handling purposes$)$ and then separated such that the distance between them is once again $25$ cm$.$ At this point, each exerts a force F$\text{'}$ on the other. How does F$\text{'}$ compare with F$?$

F$\text{'}<$ F

F$\text{'}=$ F

F$\text{'}>$ F