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mli273
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1. 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 520 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 0.30 km on a side.
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?
2. C=k(8.85x10^-12)A/d
C=Q/V
Dielectric Strength of air = 3x10^6 V/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?
2. C=k(8.85x10^-12)A/d
C=Q/V
Dielectric Strength of air = 3x10^6 V/m