jCorona usually occurs when the electrostatic stress in air around the – McqOptions

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1.	jCorona usually occurs when the electrostatic stress in air around the conductorexceeds
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 v^lue)/cm
Answer» E.

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