Question

For the situation shown in the fig. below, find the force
experience by the dipole​

Answer 1

Option-A

Explanation:

Given : axial distance of charge +Q from centre of dipole (moment of p)= r

To Find : Force experienced by dipole due to +Q charge at distance r.

Solution : The formula for electric field at a far-away point on the axis of a dipole can lead us to calculate magnitude of force.  For a small dipole, the electric  field at a distance r from the centre on the axis of the dipole has a  magnitude is given by : $E = \frac{2p}{4\pi r^{3} }$ε0

Force on dipole due to charge +Q is given by F = Q.E = $\frac{p.Q}{2\pi r^{3} }$ε0