Question

Question 13:
Why is an electric light bulb not filled with air ? Explain why argon or nitrogen is filled in an electric bulb.

Lakhmir Singh Physics Class 10

Answer 1

Answer:because argon prevents the evaporation of tungsten filaments , giving it bulb a long life.

Explanation:

Answer 2

Dear Student,

◆ Electric bulb is filled with argon/nitrogen because -

• Electric bulb contains tungsten filament which gets heated up when we light the bulb.
• If air is used in bulb, filament will burn on reaction with oxygen.
• Hence, electric bulb is filled with non-reactive gases mostly argon/nitrogen.

Thanks dear. Hope this helps you...