Multiple choice general knowledge

The filament of an electric bulb is made of

  1. tungsten

  2. nichrome

  3. graphite

  4. iron
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tungsten has the highest melting point of all metals (3422°C) and excellent strength at high temperatures, making it ideal for light bulb filaments. When electric current passes through, the filament glows white-hot without melting. Nichrome is used in heating elements, graphite in pencils and electrodes, and iron lacks the necessary heat resistance.

Keep practicing — related questions