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 Answer: Option C
Explanation
As conduction of gases is at low pressure and high voltage, called field or cold cathode emission.
There is an explanation video available below.