
A charge is placed at the centre of face of a regular cube of side . Find the electric flux passing through the cube.
Important Questions on Electric Charges and Fields


Find the dipole-moment of system

Two molecule each with permanent dipole moment are aligned as shown. Calculate the force between the molecules if they are separated by a distance that is large compared with the dimension of the dipoles.
[Hint : The relation for small is useful].

The - component of electric field at the origin will be

Two pith balls each with mass are suspended from insulating threads. When the pith balls are given equal positive charge , they hang in equilibrium as shown. We now increase the charge on the left pith ball from to while leaving its mass essentially unchanged. Which of the following diagrams best represents the new equilibrium configuration?


For two equal and opposite charges placed at distance , then electric field will be zero at
