Multiple choice

Which element is used as filament in electric bulbs?

  1. Iron

  2. Copper

  3. Tungsten

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Tungsten is used as the filament in electric bulbs due to its extremely high melting point (3,422°C) and ability to withstand high temperatures without melting. Iron and copper have much lower melting points and would quickly melt at the temperatures required for incandescent lighting.

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