Question

Tungsten is bad conductor of electricity But it is used in bulbs. Why??

Answer 1

It is bad conductor of electricity then to it is used in bulbs because when electricity is paved through tugusten it emits a lot of heat energy thus making it glow

Answer 2

Despite of being a bad conductor of electricity, tungsten is used in bulbs.

Explanation:

• Tungsten is a metal which doesn't conduct electricity at normal condition. Due to this reason, they are called bad conductors of electricity.
• Actually, at certain specific condition such as high temperature, tungsten conducts electricity and its resistivity value is $5.20\times10^{-8}$.
• When the filament of the bulb which is made of tungsten is heated it due to the high temperature it conducts electricity.  
• Due to the high melting point, high temperature doesn't have any adverse effect on it.
• Due to these characteristics of tungsten, despite being bad conductors of electricity, it is used in bulbs.

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