Electric Field of Dipole (0326)

Electric Field of Dipole, Torque, Dipole Moment

The work done is the dot product of vector (p) and vector(E)

Electric field lines of two opposite charges

"Electric Field"

Here we have the flux on surface 3 and 4 both equal to zero because they don't have any electric field lines go through.The electric flux of surface 1 is negative because electric field lines enter the surface, electric flux of surface 2 is positive because electric field lines exit the surface. These two flux have the same magnitude with the opposite directions, therefore, the net flux will be zero. Thus, the total flux of the box is zero.

Electric field of two opposite charge