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Lightning As a crude model for lightning, consider the ground to be one plate of a...

Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 740 m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that is 0.60 km on a side. (Dielectric strength of air is 3.0×106V/m)

A.What is the capacitance of this capacitor?

B.How much charge can the cloud hold before the dielectric strength of the air is exceeded and a spark (lightning) results?

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Answer #1

Date d-74om a = 0.6 km 6oom A=q² = (600) A = 36x109 m² dielectric strength E=3x100 L We know that E= 0 = Ed AE. N-Ed V- od Coclassmate Date Pege С — 36y(оч х8:gs Xto- 140 — с – ч. 3 Х(0 E C = 4.3 nf (3) , clielectric &hrength of aiE= 3x to Е — 3x106

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