CHECKING YOUR UNDERSTANDING Directions. Read and analyze the problems . Answer the practice and challenge questions Use a separate paper for your solution.he 1. A thundercloud hovers over a flat area at an altitude of 500 ? . It has horizontal dimensions of 2.0 ?? by 3.0 ?? and carries a charge of 160. C . Approximation that the cloud-ground system as a parallel-plate capacitor, compute for the a) capacitance; b) potential difference between the cloud and the ground; and c) total electrical energy in the cloud