Step-by-step explanation:
The electric force between charges is given by the formula as follows :
![F=(kq_1q_2)/(r^2)](https://img.qammunity.org/2021/formulas/physics/college/1suy3tatf1srghx2qa26d94v88dxf2e9mr.png)
k is electrostatic constant
r is distance between charges
Here, charges are equal and opposite. So,
![F=(kq^2)/(r^2)](https://img.qammunity.org/2021/formulas/physics/high-school/98rfmpol899op51i6u69ngap39wt1676wo.png)
It is clear the force is inversely proportional to the distance between charges and directly proportional to the product of charges. So, greatest force will be providing by :
- Increasing the magnitude of charges
- Decreasing the distance between charges.