Solved: Thunderclouds may develop a voltage difference of

Chapter 17, Problem 90GP

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Problem 90GP

Thunderclouds may develop a voltage difference of about 5*107 V. Given that an electric field of 3*106 V/m is required to produce an electrical spark within a volume of air, estimate the length of a thundercloud lightning bolt. [Can you see why, when lightning strikes from a cloud to the ground, the bolt has to propagate as a sequence of steps?]

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