If an electric dipole of moment $\overrightarrow{\mathit{p}}$ is placed perpendicular to the electric field $\overrightarrow{\mathit{E}},$ then the potential energy of the dipole relative to its position parallel to the field will be-

Three identical small dipoles are arranged as shown in the figure. What will be the net electric field at $P$? ($k=\frac{1}{4\pi {\epsilon }_0}$)

Three charges of $+2q$, $-q$ and $-q$ are placed at the corners $A$, $B$ and $C$ of an equilateral triangle of side $a$, as shown in the adjoining figure. Then the dipole moment of this combination is