Question

whu electric bulbs are usually filled wid nitrogen and argon and also why copper and aluminium employed for electricity transmission ...??? plzzzz fast and correct answers are appreciated ..

Answer 1

Nitrogen and argon are usually filled in electric bulbs Beacause they are inert gases and do not react with filament, and the bulb will live long.
Copper and aluminium are used for electrical transmission bcz they have low resistance and are good conductor of electricity.
Hope this will be helpful :)

Answer 2

the  bulbs are filled with inert noble gases because these gases do not react with metal even at high tempratute and thus it prolong the life of the filament (made up of tungsten,having high melting and boiling point) in the bulb..
°°°°°°°°°OR°°°°°°°°

 The closed glass chamber of the bulb contains, an inactive (inert) gas, Argon. The glass chamber can’t be filled with air as the presence of oxygen will cause the filament to burn, i.e. react with oxygen. The glass chamber can’t be made vacuum. As in vacuum condition, the filament will evaporate because of very high temperature, making the bulb unusable. The only solution to these problems is an inert gas. The inert gas within the bulb will maintain a particular pressure, preventing the filament from evaporating. An obviously, inert gas won’t react with the filament. Nitrogen is also used like argon .

I hope it will help you......