ABCDEFGH is a hollow cube made of an insulator (figure) face ABCD has positive charge on it. Inside the cube, we have ionised hydrogen.

A hollow insulated brass sphere is positively charged. The electric potential inside the sphere is

Consider a solid cube made up of insulating material having a uniform volume charge density. Assuming the electrostatic potential to be zero at infinity, the ratio of the potential at a corner of the cube to that at the centre will be

Consider a solid cube made up of insulating material having a uniform volume charge density. Assuming the electrostatic potential to be zero at infinity, the ratio of the potential at a corner of the cube to that at the centre will be

A cube has been cut out from a piezoelectric crystal. When the cube was compressed, it exhibited electric charges on the faces: a positive charge on the upper face and a negative charge on the lower (Figure (a) ). When the cube was stretched, the charges were found to change their signs (Figure (b) ). What will be the signs of the charges on these faces if pressure is applied as shown in Figura (c) ?

A short electric dipole (which consists of two point charges, + q and -9) is placed at the centre o and inside a large cube (ABCDEFGH) of length L, as shown in figure below. The electric flux, emanating through the cube is :