The dielectric strength of air at a barometric pressure of 76 cm and 2 – McqOptions

MCQOPTIONS

1.	The dielectric strength of air at a barometric pressure of 76 cm and 25 degree centigrade is
A.	30 kV/metre
B.	21.1 kV rms/cm
C.	21.1 kV rms/mm
D.	110 kV/metre
Answer» C. 21.1 kV rms/mm

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