ASSIGNMENT 1

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1-10. What is the principal advantage of anindirectly heated cathode over a directlyheated cathode?1. It is larger2. It is immune to ac heater currentvariations3. It reaches an operating temperaturemore quickly4. It has a lower operating temperature1-11. When you view an electron tube and itssocket connection from the bottom, inwhat direction are (a) the pins of thetube and (b) the pins of the socketnumbered?1. (a) Counterclockwise(b) Clockwise2. (a) Counterclockwise(b) Counterclockwise3. (a) Clockwise(b) Counterclockwise4. (a) Clockwise(b) Clockwise_______________________________________IN ANSWERING QUESTIONS 1-14THROUGH 1-16, MATCH EACH TERMLISTED IN COLUMN A WITH ITSASSOCIATED ELECTRONIC SYMBOLLISTED IN COLUMN B.A. TERMS B. SYMBOLS1-14. Dc plate resistance 1. E p1-15. Dc plate current 2. e p1-16. Dc plate voltage 3. I p4. R p_______________________________________1-12. Electron tubes are identified by anumber preceded by which of thefollowing letter designations?1. T2. V3. ET4. VT1-13. The getter in an electron tube serveswhat purpose?1. It protects the plate fromoverheating2. It allows the cathode to emit moreelectrons3. It helps to produce a better vacuum4. It anchors the tube elements in thebaseFigure 1A. — E p — I p characteristic curve.IN ANSWERING QUESTIONS 1-17THROUGH 1-23, REFER TO FIGURE 1A.1-17. The area of the graph that lies betweenpoints C and D is referred to as1. nonlinear2. straight3. linear4. curved2
1-18. In most applications, a designer wouldtry to ensure that an electron tubeoperates at which of the followingpoints on the curve?1. A2. B3. C4. D1-19. An electron tube operating at point A onthe curve would have what plateresistance?1. 7 k W2. 10 k W3. 30 k W4. 100 k W1-20. An electron tube operating at point Dcan be said to be in what condition?1. Plate saturation2. Cathode saturation3. Both 1 and 2 above4. Normal operation_______________________________________MATCH EACH ELECTRON- TUBEOPERATING CHARACTERISTIC INCOLUMN A WITH ITS CORRESPONDINGCHARACTERISTIC- CURVE POINT INCOLUMN B.A. CHARACTERISTICS B. POINTS1-21. Conduction occurs only atthe outer fringe of thespace charge1-22. All the electrons of thespace charge are attractedto the plate1-23. The point at which the tubecan be operated mostefficiently1. A2. B3. C4. D1-24. An electron tube is operated at 300 voltsand a plate current of 60 milliamperes.To avoid being damaged, the tube musthave what minimum plate dissipationrating?1. 5000 watts2. 18 watts3. 5 watts4. 0.18 watt1-25. Under which of the following conditionscan a tube be considered operatingbeyond its peak inverse voltage rating?1. When the plates glow cherry red2. When current flows from the plateto the cathode3. When current flows from thecathode in the form of an arc4. When current flows from thecathode to the plate and damageoccurs1-26. Why does control grid voltage of atriode exercise greater control than platevoltage over conduction of the tube?1. The grid is operated at a highervoltage than the plate2. The grid adds electrons to theelectron stream3. The grid is closer to the plate thanthe cathode4. The grid is closer to the cathodethan the plate1-27. The plate load resistor in an electrontubecircuit performs what function?1. It converts variations in platevoltage to current variations2. It limits the amount of plate voltagethat can be applied to the tube3. It converts variations in platecurrent to variations in plate voltage4. It limits the amount of plate currentthat can flow through the tube_______________________________________3
Page 1: ASSIGNMENT 1Textbook assignment: Ch
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Page 7 and 8: 1-51. A triode amplifier has a load

ASSIGNMENT 1

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