An electric dipole is kept in a non-uniform electric field. It experiences

Consider two charges $+q$ and $-q$ $(q > 0)$ placed at a distance $2a$ from each other. At the point $M$ (see figure below),the electric field makes an angle $\phi$ with the $x$-axis. The correct value of $\phi$ is (in $^{\circ}$)

Three identical dipoles are arranged as shown below. What will be the net electric field at $M$?

When a test charge is brought in from infinity along the perpendicular bisector of an electric dipole,the work done is ..........

What does an electric dipole experience when placed in a uniform electric field?

$A$ dipole with dipole moment $p$ is rotated by an angle $\theta$ in an electric field $E$ from the direction of the electric field. The work done on the dipole is ......