Q50
Corona usually occurs when the electrostatic stress in air around the conductor exceeds
A.
6.6 kV (r.m.s. value)/cm
B.
11 kV (r.m.s. value)/cm
C.
22 kV (maximum value)/cm
D.
30 kV (maximum value)/cm
AnswerAnswer: Option D
Solution
Answer: Option D
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