Corona usually occurs when the electrostatic stress in air around the conductor exceeds
A. 6.6 kV (RMS value)/cm
B. 11 kV (RMS value)/cm
C. 22 kV (maximum value)/cm
D. 30 kV (maximum value)/cm
Answer:D
Corona usually occurs when the electrostatic stress in air around the conductor exceeds
A. 6.6 kV (RMS value)/cm B. 11 kV (RMS value)/cm C. 22 kV (maximum value)/cm D. 30 kV (maximum value)/cm