Thermionic Emission

1. Define Thermionic emission

Question 1 of 19

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

Question 2 of 19

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

Question 3 of 19

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

Question 4 of 19

5. How is vertical deflection achieved in an oscilloscope?

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

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

Question 7 of 19

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

Question 8 of 19

9. Mention the properties of cathode rays

Question 9 of 19

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

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

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

Question 12 of 19

13. Mention the 2 types of deflection in an oscilloscope

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

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15. Mention the parts of cathode ray oscilloscope?

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

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

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