Question

Q. A metal sphere suspended through a nylon thread. When another charged sphere(identical to A) is brought near to A and kept at a distance d, a force of repulsion F acts between them. Now A is brought in contact with an identical charge sphere D and Sphere C and B also brought in contact with an identical uncharged sphere D and then they are separatedfrom each other. What will be the force between the spheres A and B when they are at a distance D/2?

Answer 1

$$\begin{gathered} Dearstudent, \\ Supposethefirstchargedsphereishavingchargeq \\ soitwillinducesameamountofoppositecharge. \\ sochargeonAisq \\ nowwithcontactofanotherunchargedsphere,chrgewillsedividedequallybetween \\ thesetwospheresbyq/2andtheywillrepeleachother. \\ soF\text{'}=k\frac{{\displaystyle \frac{q}{2}\times \frac{q}{2}}}{{\displaystyle \frac{d^2}{4}}}=\frac{k{q}^2}{d^2}=Fandthenatureisrepulsive. \\ Regards \end{gathered}$$