Electrostatics
13.0 Electric dipole
13.1 Electric field due to a dipole at axial point
13.2 Electric field on equatorial line
13.3 Electric field at any point
13.4 Dipole in an external electric field
13.5 Potential due to an electric dipole
13.0 Electric dipole
13.2 Electric field on equatorial line
13.3 Electric field at any point
13.4 Dipole in an external electric field
13.5 Potential due to an electric dipole
A set of two equal and opposite charges separated by a finite distance from an electric dipole. It is characterised by a dipole moment vector $\mathop P\limits^ \to $.
(a) Charges $\left( { + q} \right)$ and $\left( { - q} \right)$ are called the poles of the dipole.
(b) $\mathop l\limits^ \to = $ the displacement vector from $-ve$ charge to $+ve$ charge.
(c) $\mathop p\limits^ \to = $ the dipole moment $ = q\mathop l\limits^ \to $
(d) The straight line joining the two poles is called axial line.
(e) Perpendicular bisector of $\mathop l\limits^{} $ is called equatorial line.
