Which combination of the above is true of the conduction of electricity through gases?

I. Low pressure.
II. High pressure.
III. High p.d.
IV. Low p.d.

A. I and IV only
B. I and III only
C. II and IV only
D. II and III only

Correct Answer:

Option B – I and III only

Explanation

Electricity conduction through gases is usually done under low pressure (I) and high voltage (III). Thus, option B