Oxidation of the filament in a light bulb is prevented by...
Oxidation of the filament in a light bulb is prevented by the introduction of
hydrogen
oxygen
argon
mercury vapour
Correct answer is C
No explanation has been provided for this answer.
The image of an optical pin placed at the principal focus of a concave mirror will be formed ...
The period of a 10 kHz radio wave traveling at 108 ms−1 is--...
The main factor which affects the speed of sound wave is the? ...
The nucleon number of an atom is the total number of ...