The filament of electric bulb is generally made of tungsten because
[amp_mcq option1=”tungsten is cheap” option2=”durability of tungsten is high” option3=”light-emitting power of tungsten is high” option4=”melting point of tungsten is high” correct=”option4″]
This question was previously asked in
UPSC CAPF – 2013
The correct option is D. The filament of an electric bulb is generally made of tungsten because its melting point is high.
Incandescent light bulbs produce light by heating a wire filament to a very high temperature (around 2500-3000 °C) until it glows (incandescence). Tungsten has the highest melting point of all metals (3422 °C), allowing it to withstand these extreme temperatures without melting. This property is crucial for the filament’s operation.