Thermionic Emission

1. What is produced when cathode rays are suddenly stopped by a metal target?

Question 1 of 19

2. Explain how a greater degree of focusing of cathode ray beams is achieved in an oscilloscope?

Question 2 of 19

3. Name what controls the intensity of the cathode ray beam in an oscilloscope

Question 3 of 19

4. Which part of the cathode ray tube attracts electrons?

Question 4 of 19

5. Which of the following statement is INCORRECT about Cathode rays?

Question 5 of 19

6. State the reason why the screen of the cathode ray tube oscilloscope coated with graphite?

Question 6 of 19

7. Mention the parts of cathode ray oscilloscope?

Question 7 of 19

8. Why is the tube evacuated in the cathode ray tube?

Question 8 of 19

9. Which of the following is NOT among the uses of a cathode ray oscilloscope?

Question 9 of 19

10. What causes the electric field between the anodes in a cathode ray oscilloscope?

Question 10 of 19

11. Mention the 2 types of deflection in an oscilloscope

Question 11 of 19

12. Cathode rays are a stream of fast moving electrons?

Question 12 of 19

13. In a cathode ray oscilloscope which part is used to supply the electrons to be directed towards the screen?

Question 13 of 19

14. Mention the properties of cathode rays

Question 14 of 19

15. Define Thermionic emission

Question 15 of 19

16. How is horizontal deflection achieved in an oscilloscope?

Question 16 of 19

17. Which type of current is supplied to the Extra High Tension (EHT) source of the cathode ray oscilloscope?

Question 17 of 19

18. How is vertical deflection achieved in an oscilloscope?

Question 18 of 19

19. In the cathode ray tube, which part of it emits electrons by thermionic emission?

Question 19 of 19