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Electrical Engineering MCQ Question & Answer in PDF Download

Q.

Light is produced In electric discharge lamps by

  • ACathode ray emission
  • BIonisation in a gas or vapour
  • CHeating effect of current
  • DMagnetic effect of current
Correct Answer : (B)

Ionisation in a gas or vapour
Hints :

Light is produced In electric discharge lamps by Ionisation in a gas or vapour.

Electrical Engineering MCQ Question & Answer in PDF Download
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