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82. ••• Lightning bolts can carry as much as 30 C of charge and can travel between a cloud and the ground in around 100 μs. Potential differences have been measured as high as 400 million volts. (a) What is the average current in such a lightning strike? How does it compare with typical household currents? (b) What is the resistance of the air during such a strike? (c) How much energy is transferred during such a strike? (d) What mass of water at 100°C could the lightning bolt evaporate? Example 18-9

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Answer:

The average current is  300,000 A =0.3 MA

The resistance is  = 1333.33 =1.33 K ohm

The energy translated is = [tex]1.2*10^{10} J[/tex] = [tex]1.2*10^{5} GJ[/tex]

The mass of water at 100°C the lightening bolt  can evaporate is  [tex]5309.73kg[/tex]

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