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← ScienceWhich risk increases when a charged Van de Graaff generator dome exceeds its design voltage?
A)Increased corona discharge air ionization✓
B)Reduced belt friction wear occurs
C)Improved charge transfer to comb
D)Enhanced dome surface conductivity forms
💡 Explanation
Increased electrical stress exceeding the dielectric breakdown of surrounding air causes increased corona discharge, namely ionization. Because the electric field surpasses ionization threshold, air molecules become conductive, therefore initiating a discharge rather than insulating, diminishing the generators effective functioning.
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