The graph given here represents an idealized sinusoidal current flow between a cloud at a
Channel: Doubtnut
Date: 2020-02-20

The graph given here represents an idealized sinusoidal current flow between a cloud at a height of 1 km and the earth, during a lightning discharge. Value of `I_(0)` is 157 kA and T = 0.2 ms. Assume that discharge happens when the electric field in the air between the cloud and the earth becomes equal to the breakdown field of air i.e., `E_(0) = 3 xx 10^(6) V//m` (a) Calculate the total charge flow due to lightning. (b) Calculate the average current between the cloud and the earth during the lightning. (c) Assume that the entire charge on the cloud is released during the lightning and estimate the capacitance of the cloud � Earth system.