Thermionic Emission

1. Mention the properties of cathode rays

Question 1 of 19

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

Question 2 of 19

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

Question 3 of 19

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

Question 4 of 19

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

Question 5 of 19

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

Question 6 of 19

7. How is horizontal deflection achieved in an oscilloscope?

Question 7 of 19

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

Question 8 of 19

9. How is vertical deflection achieved in an oscilloscope?

Question 9 of 19

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

Question 10 of 19

11. Mention the parts of cathode ray oscilloscope?

Question 11 of 19

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

Question 12 of 19

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

Question 13 of 19

14. Define Thermionic emission

Question 14 of 19

15. Mention the 2 types of deflection in an oscilloscope

Question 15 of 19

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

Question 16 of 19

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

Question 17 of 19

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

Question 18 of 19

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

Question 19 of 19