Question

I show the vedio of gauss law in shell there a electric field inside is zero and in sphere it is kqr\R^R so what is difference between shell and sphere and please send structure difference also

Answer 1

A shell means inside is hollow that is nothing in the inside it's empty like football .if the hollow space inside sphere is filled with the same metal of shell it becomes sphere that is sphere is not hollow.

Consider a spherical gaussian surface which lies just inside the conducting shell. Now, the gaussian surface encloses no charge, since all of the charge lies on the surface of the shell, because inside the ausurfa it is empty space so no charge is there so it follows from Gauss' law, and symmetry, that the electric field inside the shell is zero.

The electric field inside a sphere of uniform charge is radially outward (by symmetry), but a spherical Gaussian surface would enclose less than the total charge Q. The charge inside a radius r is given by the ratio of the volumes because in spere there is corec sosthat carry few electric charge. so the derivation in the video you will get the equation