Question

what is the electric field due to a short dipole on the axis of dipole​

Answer 1

There is a short dipole X, Y of charge + q and − q placed along the x-axis and then we consider the point at A which is far away from the dipole and lies on the x-axis. The electric field E net experienced at that point will be E net = E XA + E YA where the E i j are vectors. The dipole charges also interact with each other.