To tolerate high operating temperatures, which of the following has to – McqOptions

MCQOPTIONS

1.	To tolerate high operating temperatures, which of the following has to be done in incandescent or tungsten filament lamps?
A.	Alloys must be used
B.	Nitrogen be used instead of inert gas
C.	Envelope is fabricated with quartz
D.	Envelope is fabricated with copper
Answer» D. Envelope is fabricated with copper

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