2.20 Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surfaces of the two spheres? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its flatter portions.
Since both spheres are connected through the wire, their potential will be the same
Let electric field at A and B be .
Now,
also
Also
Therefore,
Therefore ratio of the electric field is b/a.