Corona usually occurs when the electrostatic stress in the air around the conductor exceeds

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Q. Corona usually occurs when the electrostatic stress in the air around the conductor exceeds

(A) 32 kV (maximum values)/cm
(B) 22 kV (maximum value)/cm
(C) 11 kV (rms value)/cm
(D) 6.6 kV (rms value)/cm

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✅ Correct Answer: (A) 32 kV (maximum values)/cm

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