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A gas would serve as an electrical conductor under

Physics
JAMB 2000
A gas would serve as an electrical conductor under
  • A. reduced pressure and high current
  • B. increased magnetic field
  • C. reduced pressure and reduced potential
  • D. exposure to visible light
WAEC offline past questions - with all answers and explanations in one app - Download for free
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Correct Answer: Option A
Explanation
In general, gases conduct electricity under reduced pressure and high voltage/potential.

But from Ohms Law, current is directly proportional to voltage. Thus high current presupposes high voltage.
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free