Thermionic Emission

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

Question 1 of 19

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

Question 2 of 19

3. How is vertical deflection achieved in an oscilloscope?

Question 3 of 19

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

Question 4 of 19

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

Question 5 of 19

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

Question 6 of 19

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

Question 7 of 19

8. Mention the 2 types of deflection in an oscilloscope

Question 8 of 19

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

Question 9 of 19

10. Mention the parts of cathode ray oscilloscope?

Question 10 of 19

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

Question 11 of 19

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

Question 12 of 19

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

Question 13 of 19

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

Question 14 of 19

15. Define Thermionic emission

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16. Mention the properties of cathode rays

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

Question 17 of 19

18. How is horizontal deflection achieved in an oscilloscope?

Question 18 of 19

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

Question 19 of 19