The conductivity of gases at low pressure can be termed a...
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
Correct answer is C
As conduction of gases is at low pressure and high voltage, called field or cold cathode emission.
Which of the following elements are real magnetic materials? ...
Which of the following obeys ohms laws? ...
Which of the following instruments produces sound by the vibration of air column? ...
The motion of the prongs of the sounding tuning fork is ...
Which of the following is used for shielding radioactive fallout? ...
A device consumes 100 W of power when connected to a 120 V source. Calculate its resistance ...
The temperature of a liquid falls after some of it has evaporated because ...