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Home Electronics and Communication Engineering Microwave Communication See What Others Are Saying!
  • Question
  • In microwave circuits, a mode transducer is used to


  • Options
  • A. change mode of wave transmission
  • B. change direction of wave transmission
  • C. change polarization of wave transmission
  • D. change mode, direction or polarization wave transmission

  • Correct Answer
  • change mode, direction or polarization wave transmission 


  • More questions

    • 1. Inverters find applications in

    • Options
    • A. HVDC transmission
    • B. UPS
    • C. variable speed ac drives
    • D. all of the above
    • Discuss
    • 2. The v-i characteristics of a FET is shown in figure. In which region is the device biased for small signal amplification

    • Options
    • A. AB
    • B. BC
    • C. CD
    • D. BD
    • Discuss
    • 3. A matched generator (Zg = Z0) with 1 ? available. If all ports are matched, the power delivered at ports 1, 2, 3 respectively are

    • Options
    • A. 0.5 W, 0.5 W, 0 W
    • B. 0 W, 0 W, 1 W
    • C. 0.33 W each
    • D. 0 W, 0.25 W, 0.25 W
    • Discuss
    • 4. ?0 has no other physical meaning than that of a fundamental conversion factor.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. A wire is carrying current I. The field intensity H at a distance r from the wire

    • Options
    • A. is directed towards wire
    • B. is directed away from wire
    • C. is tangential every where to a circle of radius r
    • D. none of the above
    • Discuss
    • 6. A few minutes disturbance in space communications occurs twice a year during Sunblinding when __________ are in line.

    • Options
    • A. Sun and satellite
    • B. Sun and Earth station
    • C. Satellite and Earth station
    • D. Sun, satellite and Earth station
    • Discuss
    • 7. Which of the following is non-saturating?

    • Options
    • A. TTL
    • B. CMOS
    • C. ECL
    • D. Both (a) and (b)
    • Discuss
    • 8. The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. When a ferromagnetic substance is magnetised there are small changes in dimensions. This phenomenon is called

    • Options
    • A. hysteresis
    • B. magnetostriction
    • C. diamagnetism
    • D. dipolar relaxation
    • Discuss
    • 10. Selectivity varies with receiving frequency, frequency is raised.

    • Options
    • A. Somewhat better when the receiving frequency is raised
    • B. Somewhat better at intermediate frequency
    • C. Somewhat worse when the receiving frequency is lowered
    • D. Somewhat worse when the receiving frequency is raised
    • Discuss


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