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Home Electronics and Communication Engineering Microwave Communication Comments

  • Question
  • In a klystron amplifier the transit time of electron passing the gap in the cavity should be


  • Options
  • A. less than one cycle
  • B. less than half cycle
  • C. less than quarter cycle
  • D. more than quarter cycle

  • Correct Answer
  • less than quarter cycle 


  • Microwave Communication problems


    Search Results


    • 1. Which of the following modes cannot exist in rectangular resonant cavity?

    • Options
    • A. TE110
    • B. TE011
    • C. TM110
    • D. TM111
    • Discuss
    • 2. The beam of a radar should be

    • Options
    • A. very narrow
    • B. very wide
    • C. neither too narrow nor very wide
    • D. either (b) or (c)
    • Discuss
    • 3. In a microwave resistor the wall thickness is made as small as possible to

    • Options
    • A. have high value of R
    • B. have low value of R
    • C. minimize capacitive effect
    • D. reduce inductance
    • Discuss
    • 4. A line slightly longer than length and short circuited at far end behaves as

    • Options
    • A. an inductance
    • B. a capacitance
    • C. L and C in series
    • D. L and C in parallel
    • Discuss
    • 5. Microwaves are used for

    • Options
    • A. telephony
    • B. radio broadcast
    • C. TV systems
    • D. all of the above
    • Discuss
    • 6. Consider the following statements about hybrid ring

      1. Ports 1 and 2 are decoupled.
      2. Port 3 and 4 are coupled.
      3. A signal entering either port 1 or 2 splits equally between ports 3 and 4.
      4. A signal entering either port 3 or 4 splits equally between ports 1 and 2.
      Which of the above are correct?

    • Options
    • A. 1, 2, 3 and 4
    • B. 1, 3 and 4
    • C. 1 and 2
    • D. 2, 3 and 4
    • Discuss
    • 7. Match the following:

      List I List II
      A. e-t ? (t) 1.
      B. 2. j? X(?)
      C. 3.
      D. 4.


    • Options
    • A. A-1, B-4, C-2, D-3
    • B. A-3, B-2, C-4, D-1
    • C. A-1, B-2, C-4, D-3
    • D. A-3, B-4, C-2, D-1
    • Discuss
    • 8. Match the following:

      List I List II
      A. (? x E)ds = 0 1. Continuity equation
      B. rv.dv = Q 2. Ampere's law
      C. (J + D)ds 3. Gauss law
      D. -rvdv 4. Faraday's law
      E. H.dl = (? x H)ds 5. Stoke's theorem


    • Options
    • A. A-4, B-3, C-2, D-1, E-5
    • B. A-1, B-2, C-3, D-4, E-5
    • C. A-4, B-2, C-1, D-3, E-5
    • D. A-1, B-5, C-4, D-2, E-3
    • Discuss
    • 9. Match the following:

      List I List II
      A. 1. Negative limiter
      B. 2. Positive Limiter
      C. 3. Biased negative Limiter
      D. 4. Biased positive limiter


    • Options
    • A. A-1, B-2, C-3, D-4
    • B. A-2, B-1, C-4, D-3
    • C. A-2, B-1, C-3, D-4
    • D. A-1, B-2, C-4, D-3
    • Discuss
    • 10. Match the following:

      List I List II
      A. Anderson Bridge 1. Low resistance
      B. Kelvin Bridge 2. Medium resistance
      C. Schering Bridge 3. Inductance
      D. Wheatstone Bridge 4. Capacitance


    • Options
    • A. A-4, B-2, C-3, D-1
    • B. A-3, B-2, C-4, D-1
    • C. A-3, B-1, C-4, D-2
    • D. A-4, B-1, C-3, D-2
    • Discuss


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