Thermionic Emission

1. Define Thermionic emission

Question 1 of 19

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

Question 2 of 19

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

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4. Mention the 2 types of deflection in an oscilloscope

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

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6. Mention the properties of cathode rays

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

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8. How is vertical deflection achieved in an oscilloscope?

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9. How is horizontal deflection achieved in an oscilloscope?

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

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

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

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

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

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

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

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17. Mention the parts of cathode ray oscilloscope?

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

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

Question 19 of 19