If an electric dipole is placed inside a uniform electric field, then
1
\({\rm{Torque\;}}\left( {\vec \tau } \right) = \vec p \times \;\vec E\) and Force = 0
2
Force = - qE and Torque = 0
3
\({\rm{Torque\;}}\left( {\vec \tau } \right) = \frac{{\vec p}}{{\vec E}}\) and Force = +qE
4
Torque = 0 and Force = 0