The distance between the two charges $+q$ and $-q$ of a dipole is $r$. On the axial line at a distance $d$ from the centre of the dipole,the electric field intensity is proportional to:

The force on a charge situated on the axis of a dipole is $F$. If the charge is shifted to double the distance,the new force will be

The dipole moment of a system of charge $+q$ distributed uniformly on an arc of radius $R$ subtending an angle $\pi /2$ at its centre, where another charge $-q$ is placed at the centre, is:

An electric dipole is placed at the centre of a sphere. Mark the correct answer.

There exists a non-uniform electric field along the $x-$ axis as shown in the figure below. The field increases at a uniform rate along the $+ve$ $x-$ axis. $A$ dipole is placed inside the field as shown. Which one of the following is correct for the dipole?

An electric dipole will have minimum potential energy when it subtends an angle with the direction of the electric field.