What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line (in $^o$)?

An electric dipole is placed at an angle of $30^o$ to a non-uniform electric field. The dipole will experience:

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

What is the net charge on an electric dipole? Why?

The unit of electric dipole moment is ......... .

An electric dipole is placed in a uniform electric field $\vec{E}$ of magnitude $40\ N/C$. The graph shows the magnitude of the torque $\tau$ on the dipole versus the angle $\theta$ between the field $\vec{E}$ and the dipole moment $\vec{p}$. The magnitude of the dipole moment $\vec{p}$ is equal to: