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JAMB Physics 2011 Question 46

Question 46

Conduction through Liquids and Gases

Under which of the following conditions do gases conduct electricity?

  1. A.High pressure and low p.d.
  2. B.High pressure and high p.d.
  3. C.Low pressure and low p.d.
  4. D.Low pressure and high p.d.
Show the answer and explanation

Answer: D (Low pressure and high p.d.)

Explanation

Gases conduct when their pressure is low and a high p.d. is applied, as in a discharge tube.