Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
For Business Enquiry


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM

Why is rate of thermionic emission less in an evacuated bulb as compared to one which is filled with inert gas at low pressure?

Asked by Topperlearning User 21st May 2014, 1:20 PM
Answered by Expert

The reason for the above fact is that " Vacuum is the poorest conductor of electricity".  Due to this few electrons can migrate from cathode to anode.  But, if the bulb is filled with inert gas at low pressure, then rate of thermionic emission increases.

Answered by Expert 21st May 2014, 3:20 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp