The force exerted between S and p is 1/16 the force exerted between S and q.
The force between two charge particle is inversely proportional to the square of the distance between the particles.
The force exert between S and q is given as
Fsq=
Eq. (1)
The force exert between S and p is given as
Fsp=
![\frac{Q'}Q}{4^(2) Eq. (2)</p><p>On comparing eq. (1) and (2)</p><p>Fsp=[tex] (Fsq)/(16)](https://img.qammunity.org/2019/formulas/physics/high-school/md14bh0ddilh0no6pkata27elz6syx5jdh.png)