Consider two hollow concentric spheres,
S1 and
S2, enclosing charges
2Q and
4Q respectively as shown in the figure. (i) Find out the ratio of the electric flux through them. (ii) How will the electric flux through the sphere
S1 change if a medium of dielectric constant
′ϵr′ is introduced in the space inside
S1 in place of air? Deduce the necessary expression.
