Thermionic Emission

1. Mention the parts of cathode ray oscilloscope?

Question 1 of 19

2. How is horizontal deflection achieved in an oscilloscope?

Question 2 of 19

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

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4. Define Thermionic emission

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

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6. Mention the 2 types of deflection in an oscilloscope

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

Question 7 of 19

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

Question 8 of 19

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

Question 9 of 19

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

Question 10 of 19

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

Question 11 of 19

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

Question 12 of 19

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

Question 13 of 19

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

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15. Mention the properties of cathode rays

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

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17. How is vertical deflection achieved in an oscilloscope?

Question 17 of 19

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

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

Question 19 of 19