Question
Download Solution PDFThe glass bulb of an electric bulb is sealed to:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT
- Electric bulb: It is an electric device that converts electric energy into heat and light energy.
- It is generally made of glass with inert gases filled in it (Nitrogen and argon).
- The filament is made of tungsten which has a very high melting point.
EXPLANATION:
- The closed glass chamber of the electric bulb contains an inactive (inert) gas, Argon.
- The glass chamber can’t be filled with air as the presence of oxygen will cause the filament to burn, i.e. react with oxygen. Therefore option 1 is correct.
- The glass chamber can’t be made vacuum. As in vacuum conditions, the filament will evaporate because of a very high temperature, making the bulb unusable.
- The inert gas within the bulb will maintain a particular pressure, preventing the filament from evaporating.
- The glass bulb of an electric bulb is sealed so as to maintain the temperature inside the bulb and prevent it from the humidity. Therefore option 2 and 3 is correct.
- Nitrogen is also used like argon. Therefore option 2 is correct.
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