Multiple choice

Why is tungsten used in manufacture of electric bulb?

  1. It is cheaper than other metals

  2. It is both durable and economical

  3. It has high milting point

  4. It makes the bulb light brighter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Due to very high melting point of tungsten it can withstand very high temperature inside the bulb without burning. So filament of the bulb is made of tungsten.

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