# HW7 - file/C/Documents and...

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file:///C:/Documents%20and%20Settings/lbr/Desktop/HW17Ans_files. .. 2 of 13 10/18/2006 2:13 PM A sphere of radius 2.49 contains a charge of 54.0 uniformly distributed throughout it. What is the charge density? ANSWER: = Part B If the same charge were distributed uniformly over the surface of the sphere rather than throughout its volume, the charge density would be: ANSWER: = Class 19 The Charge on a Thundercloud Description: Estimate the charge on a thundercloud just before a lightning strike, given the breakdown voltage of air. In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. Thus, the charge can be considered to be distributed uniformly throughout the cloud. For the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. The point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. This breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another
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HW7 - file/C/Documents and...

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