For the shown situation of two dipoles,the nature of forces between them is:

Three point charges of $+2q, +2q$ and $-4q$ are placed at the corners $A, B$ and $C$ of an equilateral triangle $ABC$ of side '$x$'. The magnitude of the electric dipole moment of this system is

The electric field $\vec{E}$ at a point at a distance $r$ from the axis of a dipole is given by:

The electric field at a point on the equatorial line of a dipole and the direction of the dipole moment:

An electric dipole of dipole moment $p$ is aligned parallel to a uniform electric field $E$. The energy required to rotate the dipole by $90^{\circ}$ is $\left[\begin{array}{ll}\sin 0^{\circ}=0, & \sin 90^{\circ}=1 \\ \cos 0^{\circ}=1, & \cos 90^{\circ}=0\end{array}\right]$

An electric dipole is placed in a non-uniform electric field such that the angle between $\vec{p}$ and $\vec{E}$ is not $0^{\circ}$ or $180^{\circ}$. It experiences . . . . . . .