Question: Lightning is striking somewhere on the planet at all times of the day. This and other meteorological phenomena produce a sustained vertical electric fieldpointing downward

Lightning is striking somewhere on the planet at all times of the day. This and other meteorological phenomena produce a sustained vertical electric field—pointing downward toward the center of the Earth—that averages about 140 N/C near the surface. What is the average net charge per unit area on the Earth’s surface?

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