In each situation of Column-I two elelctric dipoles having moments vec(p)_(1) and vec(p)_(1) of same magnitude ("that is ", p_(1)=p_(2)) are placed on x-axis symmetrically about origin in different orientations as shown. In column-II certain inferences are drawn for these two dipoles. Then match the different orientations of dipole in column-I with the corresponding result in column-II.

In each situation of Column-I two elelctric dipoles having moments vec

1.	In each situation of Column-I two elelctric dipoles having moments vec(p)_(1) and vec(p)_(1) of same magnitude ("that is ", p_(1)=p_(2)) are placed on x-axis symmetrically about origin in different orientations as shown. In column-II certain inferences are drawn for these two dipoles. Then match the different orientations of dipole in column-I with the corresponding result in column-II.
Answer» Solution :`:'` Electric field due to an electric dipole at a point on equatorial line of dipole makes either `0^(@)` or `180^(@)` with the dipole moment of another dipole. `:.` TORQUE on dipole `vec(tau)=vec(P)xxvec(E)` becomes zero `( :' theta=0 or theta=180^(@))` HENCE in column II. [P] option is suit for every QUERIES for column I. Electrostalic potential energy `(U)=-PE cos theta` `theta=` Angle between moment & electric field. [A] Here `theta=180^(@) :. U=-PE cos 180^(@)=PE`(+ve) [B] Here `theta=0^(@) :. U=-PE cos theta=-PE` (-ve) `[C] & [D] : theta lt 90^(@) :. U=` -V