Question 48
Conduction through Liquids and GasesA gas would serve as an electrical conductor under
- A.reduced pressure and reduced potential
- B.reduced pressure and high current
- C.increased magnetic field
- D.exposure to visible light.
Show the answer and explanation
Answer: B (reduced pressure and high current)
Explanation
Gases conduct (as in a discharge tube) at low pressure with a high voltage driving a current through them; the other conditions do not ionise the gas.