$A$ charge is placed on the axis of an electric dipole and experiences a force $F$. If the distance is doubled,what will be the new force?

In the situation shown in the diagram,if $q \ll |Q|$ and $r \gg a$,find the net force on the free charge $-q$ and the net torque on it about $O$ at the instant shown. ($p = 2aQ$ is the dipole moment).

An electric dipole is placed on the $x$-axis as shown in the figure. Consider a spherical closed surface around it. Then,

The net electric field at the given point $O$ due to all the four identical short electric dipoles of dipole moment $p$ each,as shown in the figure,is $\left( k = \frac{1}{4\pi \varepsilon_0} \right)$.

Choose the incorrect statement from the following.

The ratio of electric fields on the axis and at the equator of an electric dipole is