Question

Two uniformly charged insulating solid spheres A and B both of radius a carry total charges +Q and -Q respectively.The spheres are placed touching each other as shown in the figure.If the potential at the centre of the sphere A is V(A)=......,.?

Ans9×10⁹(Q/a)

Answer 1

$$V(A)=k\frac{Q}{a}\\V(A)=9\cdot10^9\frac{Q}{a}$$