Derive an expression for the electric field E due to a dipole of length 2a at a point at a distance r from the centre of the dipole on the axial line.

(a) Derive an expression for the elecrtric field E due to a dipole of length '2a at a point distant r from the centre of the dipole on the axial line. (b) Draw a graph of E versus r for r gt gt a . (c) If the diploe were kept in a uniform external electric fields E_(0) Diagrammatically represent the position of the dipole in stable and unstable equilibrium and write the expressions for the torque acting on the dipole in both the cases.

Derive an expression for electric field due to an electric dipole at a point on the axial line.

Derive an expression for the magnetic field due to magnetic dipole in broad-side on position at a distance r from its centre. The length of the dipole is 2 l and its magnetic moment is M.

The electric field due to a small dipole of length 2l at distance r ( rgtgtl) from the centre of the dipole on the axial line is E. What is the distance of the point on the perpendicular bisector of the dipole from its centre in which the electric field intensity is E ?

A short electric dipole has dipole moment of 1 xx 10^-9 Cm .Determine the electric potential due to the dipole at a point distance 0.3m from the centre of the dipole situated on the axial line

Derive the expression for the electric potential due to an electric dipole at a point on its axial line.