Question

Find the electric field intensity due to a uniformly charged spherical shell at a point (ii) inside the shell. Plot the graph of electric field with distance from the centre of the shell.

Answer 1

Field inside the shell: The point P will be inside the shell. The Gaussian surface is again a sphere through P centred at O.

The flux through the Gaussian surface, calculated as before, is E × 4πr².

However, in this case, the Gaussian surface encloses no charge. Gauss’s law then gives

E = 4πr² = 0

∴ E = 0

Thus, the field due to a uniformly charged thin shell is zero at all points inside the shell

Graph showing the electric field with the distance from the centre of the shell: