Q4 Compare the electric field of an electric dipole with the electric field of a point charge. To this end consider the dipole approximation and: (a)Draw the the electric field lines for the point charge and for the dipole.[5] (b)Hence or otherwise, briefly comment on the difference of the fieldlines properties and on the different dependence of the electric field [5]amplitude with the distance. (c)Using the appropriate formalism, demonstrate the electric field properties of the dipole starting from the Coulomb's law and the superposition principle.

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