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: Option C
Related Questions on Analytical Tools in Biotechnology
A. Graphite
B. MgF2
C. Fe
D. AgNO3
A. Tungsten
B. Quartz
C. Element to be investigated
D. Aluminium
A. Radiant power transmitted by the sample
B. Radiant power absorbed by the sample
C. Sum of powers absorbed and scattered
D. Sum of powers transmitted and reflected
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