Question

The parallel-plate capacitor

Consider the Earth and a cloud layer 800 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 1.0 km2 = 1.0e6 m2,what is the capacitance? (b) If an electric field strength greater than 3.0e6 N/C causes the air to break down and conduct charge (lighting), what is the maximumcharge the cloud can hold?
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