everyday science MCQ #400

Though the temperature inside a lighted electric bulb is around 2700°C, the filament does not burn because:

everyday science MCQ #400

  1. Question 1

    Q1. Though the temperature inside a lighted electric bulb is around 2700°C, the filament does not burn because:

    • A) The metal of which it is made is resistant to burning
    • B) The oxygen necessary for combustion (and burning) is not available as the bulb is evacuated and filled with pure nitrogen or inert gases
    • C) It does not burn in closed systems
    • D) It is made of a non-metallic substance

    Answer: The oxygen necessary for combustion (and burning) is not available as the bulb is evacuated and filled with pure nitrogen or inert gases

    Explanation: The bulb is filled with nitrogen or inert gases (like argon) instead of oxygen; without oxygen, the tungsten filament cannot undergo combustion even at temperatures exceeding 2,700°C.