An electric dipole is held in a uniform electric field .
(i) Show that the net force acting on it is zero.
(ii) The dipole is aligned parallel to the field . Find the work done in rotating it throught the angle of `180^(@)`

Explanation

`vecF_(1)=+qvecEandvecF_(2)=-qvecE`
`vecF_("net")=vecF_(1)+vecF_(2)`
`thereforeF_("net")=0`
Alternatively,

`thereforeF_("net")=0`
(ii) Where p is the electric dipole moment.
W=2pE