Torque on a Dipole in a Uniform Electric Field

Electric Field due to Electric Dipole

(i).At an Equatorial Point-

Let an Electric Dipole ‘AB’ having charge -q and +q separated at a distance 2a is placed in vacuum. If P is the point on the axial line at a distance ‘r’ from the centre of dipole, then

Electric Field due to Electric Dipole

(i).At an axial Point-

Let an Electric Dipole ‘AB’ having charge -q and +q separated at a distance 2a is placed in vacuum. If P is the point on the axial line at a distance ‘r’ from the centre of dipole, then

Electric Field due to a Discrete Distribution of Charge(Principle of Superposition)--

It states that electric field at any point due to a group of charges is equal to the vector sum of the electric fields produced by each charge individually at that point, when all oter charges are assumed to be absent.

Let us consider that n point charges q₁, q₂, q₃……..are distributed in space in discrete manner.

The net electric field at point P will be,