In good weather and due to the presence of positive charges in the ionosphere, the surface of the Earth (considered as conducting) becomes negatively charged by influence. Some equipotential contours are shown in Figure 1 below. The tree and the ground are at the reference potential, V = 0V.
1. Draw electric field lines through points M, N, O, P, Q, and R. Draw the field lines,
In which regions is the electric field uniform ? Where is it strongest ?
Figure 1: Fair weather equipotentials.