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

$A$ given charge is situated at a certain distance from an electric dipole in the axial position and experiences a force $F$. If the distance of the charge is doubled,the force acting on the charge will be:

From which law and principle can the electric field of an electric dipole be obtained?

$A$ dipole with an electric moment $\vec{p}$ is located at a distance $r$ from a long thread charged uniformly with a linear charge density $\lambda$. Find the force $F$ acting on the dipole if the vector $\vec{p}$ is oriented along the thread.

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 . . . . . . .

An electric dipole is placed at an angle of $30^\circ$ with an electric field intensity of $2 \times 10^5 \, \text{NC}^{-1}$. It experiences a torque equal to $4 \, \text{Nm}$. The charge on the dipole,if the dipole length is $2 \, \text{cm}$,is: