Question

Two identical metal spheres carry charges of +q and -2q reap when the spheres are separated by a large distance r the force between them I'd F now the spheres are allowed to touch and then moved back to the same separation find the new force of repulsion between them

Answer 1

Answer:

(kq^2)/4r^2

Explanation:

avg. of both spheres ={q+(-2q)}/2=-q

and proceedings same as basic questions by applying kq1q2/ r2