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NTPC Graduate Tier 1 2016 Shift 2 📅 02 Apr, 2016

The filament of a light bulb is made up of -

A
Platinum
B
Tantalum
C
Tungsten
D
Antimony
Result Summary
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APEDIA

NTPC Graduate Tier 1
2016 • 02 Apr, 2016 • Shift 2
The filament of a light bulb is made up of -
Correct Answer
Tungsten
Material Requirements: An incandescent light bulb operates by passing an electric current through a thin wire until it gets so hot that it glows brightly. This ......
💡 Analysis & Explanation
Material Requirements
An incandescent light bulb operates by passing an electric current through a thin wire until it gets so hot that it glows brightly. This requires a material with exceptionally high electrical resistance and an extremely high melting point.
Element Selection
Tungsten (symbol W) has the highest melting point of all discovered pure metals (around 3,422 °C), preventing it from instantly melting under extreme heat.
Conclusion
Therefore, Tungsten is the standard and ideal material used for crafting bulb filaments.