A thunderstorm cloud can be represented as an electric dipole with 10 c of charge. The bottom part of the cloud is at h1=5km above the ground (Fig.P6.16)
The soil is wet and can be assumed to be a good conductor. (1) Find the potential and the electric field at the surface of the earth right under the cloud. (2) Find the surface charge density at points A and B the surface (Fig.P6.16),for X=5km.