Module 2 : Electrostatics
Lecture 9 : Electrostatic Potential
  Example 16 :
The net electric force on a dipole is zero only if the field is uniform. In a non-uniform field, the dipole experiences a net force. Consider a dipole consisting of charges $\pm q$separated by a distance $d$ in an electric field $E_0(1+\alpha z)\hat k$, where $E_0$and $\alpha$are constants. Determine the net force on the dipole when the dipole is aligned (a) parallel and (b)anti-parallel to the field.
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