Multiple choice

The filament of an electric bulb, is generally, made from

  1. manganin

  2. nichrome

  3. tungsten

  4. platinum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tungsten is used for electric bulb filaments because it has the highest melting point (3422°C) among all metals, allowing it to withstand the intense heat without melting. It also has high tensile strength and low vapor pressure at operating temperatures, making it ideal for long-lasting illumination. Tungsten's resistance causes it to glow white-hot when current flows through it.

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