The dipole moment of the given charge distribution is,

Six charges are placed at the vertices of a regular hexagon as shown in the figure.

The electric field on the line passing through point $O$ and perpendicular to the plane of the figure at a distance of $x(>>a)$ from $O$ is,

Figure shows electric field lines in which an electric dipole $p$ is placed as shown. Which of the following statements is correct?

In the figure the net torque acting on the dipole is

In air, a charged soap bubble of radius $r$ is in equilibrium, outside and inside pressures being equal. The charge on the drop is $\left(\varepsilon_{0}=\right.$ permittivity of free space, $T=$ surface tension of soap solution),