Two concentric spherical shells `S_1 and S_2` enclose charge Q and 2Q as shown in the figure
How will the electric flux through the shells `S_1` change, if a medium of dielectric constant 10 replaces air in the shell `S_1`?

S_1 and S_2 are two parallel concentric spheres enclosing charges Q and 2Q respectively as shown in the figure. How will the electric flux through the sphere S_1 change, if a medium of dielectric constant 5 is introduced in the space inside S_1 in plae at air?

S_1 and S_2 are two hollow concentric spheres encloing charges Q and 2 Q respectively as shown in Fig. How will the electric flux through the spheres S_1 change if a medium of dielectric constant 5 is introduced in the sphere inside S_1 in place of air?

Two concentric spherical shells S_1 and S_2 enclose charge Q and 2Q as shown in the figure If air is inside the tow shells, what is the ratio of electric flux through S_1 and S_2 ?

S_1 and S_2 are two parallel concentric spheres enclosing charges Q and 2Q respectively as shown in the figure. what is the ratio of the electric flux through S_1 and S_2 ?

S_1 and S_2 are two hollow concentric spheres encloing charges Q and 2 Q respectively as shown in Fig What is the ratio of electric flux through S_1 and S_2 ?

A spherical conducting shell of inner radius r_1 and outer radius r_2 has a charge Q as shown in the figure. A charge q is placed at the centre of the shell. What is the surface charge density of the inner and outer sufaces of the shell?

A spherical conducting shell of inner radius r_1 and outer radius r_2 has a charge Q as shown in the figure. Is the electric field isnide a cavity (with no charge) zero, even if the shell is not spherical, but has any irregular shape? Explain.

A small sphere of radius r_1 and charge q_1 is enclosed by a spherical shell of radius r_2 and charge q_2 . Show that if q_1 is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge q_2 on the shell is.

A spherical conducting shell of inner radius r_1 and outer radius r_2 has a charge Q. A charge q is placed at the centre of the shell. What is the surface charge density on the inner and outer surfaces of the shell?

Name the element with electronic configuration 1s2 2s1