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Questions and Answers
What is the purpose of the cathode ray tube (oscilloscope) according to the text?
What is the purpose of the cathode ray tube (oscilloscope) according to the text?
- To determine the amplitude, periodic time, and frequency of given waves (correct)
- To deflect the beam of electrons using magnetic fields
- To create a vacuum for electron beam emission
- To produce light using kinetic energy of electrons
What is the pressure of the gas inside the cathode ray tube?
What is the pressure of the gas inside the cathode ray tube?
- 0.01 mmHg (correct)
- 10 mmHg
- 1 atm
- 100 Pa
What is the purpose of the deflecting system in the cathode ray tube?
What is the purpose of the deflecting system in the cathode ray tube?
- To adjust the pressure inside the tube
- To deflect the beam of electrons (correct)
- To control the emission of gas
- To produce a fluorescent material
What determines the position of the falling electrons on the screen of the cathode ray tube?
What determines the position of the falling electrons on the screen of the cathode ray tube?
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What is the purpose of the inner side of the wide end of the tube being coated with a layer of emulsion of carbon?
What is the purpose of the inner side of the wide end of the tube being coated with a layer of emulsion of carbon?
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Study Notes
Cathode Ray Tube (Oscilloscope)
- The purpose of the cathode ray tube is to display electrical signals visually.
Operating Conditions
- The gas inside the cathode ray tube is at a very low pressure, approximately 10^(-9) mmHg.
Deflecting System
- The deflecting system is responsible for directing the flow of electrons in a specific pattern on the screen, creating a visual representation of the input signal.
Electron Beam Positioning
- The position of the falling electrons on the screen is determined by the strength and direction of the electric and magnetic fields.
Tube Construction
- The inner side of the wide end of the tube is coated with a layer of emulsion of carbon to increase the efficiency of the cathode ray tube by reducing the reflection of electrons.
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