Q. 17. In secondary ionization by photons: A) Electrons are emitted from the cathode. B) The photons give their energy to the gas molecules. C) The electrode work function needs to be very large. D) None.
Q. 17. In secondary ionization by photons: A) Electrons are emitted from the cathode. B) The photons give their energy to the gas molecules. C) The electrode work function needs to be very large. D) None.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter1: Atomic Structure
Section: Chapter Questions
Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?
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please solve the 2 questions, thanks sir
![Q. 17. In secondary ionization by photons:
A) Electrons are emitted from the cathode.
B) The photons give their energy to the gas molecules.
C) The electrode work function needs to be very large.
D) None.
waim]||
Q. 18. According to Townsend observations on the current growth after increasing the voltage across
parallel plates of a capacitor:
A) The current first increases proportionally due to ionization by collision
B) Close to breakdown, the current increases proportionally due to secondary ionization processes
C) After reaching self-sustained discharge, the current needs to go to infinity
D) All of the above](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F969923c0-f364-4b35-9f7d-e90ce77f2c00%2F482d4722-44d8-43d5-86ab-c74959658c5b%2Fz36ppxa_processed.png&w=3840&q=75)
Transcribed Image Text:Q. 17. In secondary ionization by photons:
A) Electrons are emitted from the cathode.
B) The photons give their energy to the gas molecules.
C) The electrode work function needs to be very large.
D) None.
waim]||
Q. 18. According to Townsend observations on the current growth after increasing the voltage across
parallel plates of a capacitor:
A) The current first increases proportionally due to ionization by collision
B) Close to breakdown, the current increases proportionally due to secondary ionization processes
C) After reaching self-sustained discharge, the current needs to go to infinity
D) All of the above
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