EASY
12th Odisha Board
IMPORTANT
Earn 100

What is the significance of a work function in thermionic emission?

Important Questions on Electron Emission

MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 5
Write Richardson-Dushman equation of thermionic equation?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 6
What are different methods of obtaining electron emission?
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 7
What do you mean by surface barrier?
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 8
What are the materials used for the thermionic emitters?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 9
What are the advantages of indirectly heated cathode over the directly heated cathode?
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 10
State two principal electrodes that are present in every vacuum tube.
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 11
Specify the most common use of a diode valve?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 18 - Electron Emission>MODEL QUESTIONS>Q 12
What is the maximum efficiency of an (i) half-wave rectifier and (ii) full-wave rectifier?