D4: The practical limit to an electric field in air is about 3×106 N/C. Above this strength, sparking takes place becaus
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D4: The practical limit to an electric field in air is about 3×106 N/C. Above this strength, sparking takes place becaus
D4: The practical limit to an electric field in air is about 3×106 N/C. Above this strength, sparking takes place because air begins to ionize and charges flow, reducing the field. For a metal ball of radius 3.5 centimeters, what is the limit to the total positive charge on the surface of the ball before the electric field at the surface reaches that limit?
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