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
- I & II
- II & III
-
III & IV
- IV & V
The correct answer is: 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 .