The conductivity of gases at low pressure can be termed as I. hot cathode emission II. thermo ionic emission III. cold cathode emission IV. Field emission

The conductivity of gases at low pressure can be termed as
I. hot cathode emission
II. thermo ionic emission
III. cold cathode emission
IV. Field emission
A. I & II
B. II & III
C. III & IV
D. IV & V

Correct Option: Answer is C
As conduction of gases is at low pressure and high voltage, called field or cold cathode emission.

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