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The process of electric — between clouds...

The process of electric — between clouds and the earth or between different clouds causes

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**Step-by-Step Solution:** 1. **Understanding Electric Discharge**: Electric discharge is the process where electric energy is released. This can occur between two charged bodies, such as clouds and the earth, or between different clouds. 2. **Identifying the Cause**: The electric discharge happens when there is a significant voltage difference between the clouds and the earth or between different clouds. This voltage difference can build up due to various atmospheric conditions. 3. **Result of Electric Discharge**: When the voltage difference becomes large enough, it overcomes the resistance of the air, leading to a rapid release of energy in the form of light and sound. ...
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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.