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Home ‣ Electronics and Communication Engineering ‣ Radio Receivers See What Others Are Saying!
  • Question

  • Superheterodyne receiver can be used in


  • Options
  • A. AM
  • B. FM
  • C. SSB
  • D. All of the above

  • Correct Answer
  • All of the above 

    • More questions

    • 1. The number of valence electrons in germanium atom is

    • Options
    • A. 4
    • B. 2
    • C. 1
    • D. zero
      • Discuss
    • 2. The carrier mobility in a semiconductor is 0.4 m2/Vs. Its diffusion constant at 300 K will be (in m2/s)

    • Options
    • A. 0.40
    • B. 0.16
    • C. 0.04
    • D. 0.01
      • Discuss
    • 3. For iron, the ferromagnetic Curie temperature is

    • Options
    • A. about 20 K
    • B. about 100°C
    • C. about -20°C
    • D. about 1000 K
      • Discuss
    • 4. Nichrome is used for

    • Options
    • A. overhead line wires
    • B. heater coils
    • C. lamp filaments
    • D. all of the above
      • Discuss
    • 5. Which inductor is used at high frequencies?

    • Options
    • A. Cast iron cored
    • B. Sheet steel cored
    • C. Iron alloy cored
    • D. Ceramic cored
      • Discuss
    • 6. A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.

    • Options
    • A. 49
    • B. 47.33
    • C. 50.33
    • D. 50
      • Discuss
    • 7. In the given figure the equivalent circuit of a T attenuator. If the condition for matched attenuator is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. The selectivity of most receivers is determined largely by

    • Options
    • A. sensitivity
    • B. characteristics of IF section
    • C. antenna direction
    • D. all of the above
      • Discuss
    • 9. The output of a diode detector contains

    • Options
    • A. D.C. voltage
    • B. modulating signal
    • C. RF ripple
    • D. all of the above
      • Discuss
    • 10. In a microwave power measurement using bolometer, the principle of working is variation of

    • Options
    • A. inductance with absorption of power
    • B. resistance with absorption of power
    • C. capacitance with absorption of power
    • D. cavity dimension with heat generated by power
      • Discuss

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