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Home ‣ Electronics and Communication Engineering ‣ Matching Questions See What Others Are Saying!
  • Question

  • Match the following:

    List I (Antenna) List II (Communication system)
    A. Turnstile 1. Radar
    B. Yagi 2. TV transmission
    C. Dish 3. MW broadcasting
    D. Vertical mast 4. TV reception


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

  • Correct Answer
  • A-2, B-4, C-3, D-1 

    • More questions

    • 1. A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is Is and rms value of load current in Irms. Then

    • Options
    • A. Is = Irms irrespective of the value of firing angle
    • B. Is = 0.5 Irms irrespective of the value of firing angle
    • C. Is = Irms if firing angle is less than 30°
    • D. Is = Irms if firing angle is more than 30°
      • Discuss
    • 2. A single phase semiconverter is feeding a highly inductive load. The circuit has a freewheeling diode across the load and firing angle is a. During one cycle of input voltage, the total duration of conduction of freewheeling diode is

    • Options
    • A. a
    • B. 2 a
    • C. 4 a
    • D. 0.5 a
      • Discuss
    • 3. RF amplifiers are used in radio receivers for

    • Options
    • A. better sensitivity
    • B. improved signal-to-noise ratio
    • C. better coupling of receiver to the antenna
    • D. all of the above
      • Discuss
    • 4. The arrangement in the given figure is a hybid T. If 100 mW fed at port 1, the power reflected back at port 1 is

    • Options
    • A. 0
    • B. 25 mW
    • C. 50 mW
    • D. 100 mW
      • Discuss
    • 5. An 8 bit DAC has a full scale output of 2 mA and full scale error of ± 0.5%. If input is 10000000 the range of outputs is

    • Options
    • A. 994 to 1014 ?A
    • B. 990 to 1020 ?A
    • C. 800 to 1200 ?A
    • D. none of the above
      • Discuss
    • 6. An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

    • Options
    • A. 2%
    • B. 2.5%
    • C. 4%
    • D. 5%
      • Discuss
    • 7. If the frequency of a wave 20 Hz, the time period is

    • Options
    • A. 20 secs
    • B. 2 secs
    • C. 0.2 secs
    • D. 0.05 secs
      • Discuss
    • 8. A moving iron instrument gives correct reading when used at

    • Options
    • A. low frequencies
    • B. high frequencies
    • C. only one frequency
    • D. all frequencies upto a certain value
      • Discuss
    • 9. A 3 phase bridge inverter is fed by 400 V battery. The load is star connected and has a resistance of 10 ? per phase. The peak value of thyristor current is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. Match the following:

      List I List II
      A. Very low response at very high frequencies 1. Low-pass system
      B. Over shoot 2. Velocity damping
      C. Synchro-control transformer output 3. Natural frequency
      4. Phase-sensitive modulation
      5. Damping ratio


    • Options
    • A. A-1, B-5, C-4
    • B. A-3, B-2, C-4
    • C. A-2, B-5, C-4
    • D. A-4, B-1, C-3
      • Discuss

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