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  • Question

  • Consider the following statements

    1. Dissipative attenuator has a fixed value of attenuation.
    2. Reflective attenuator has a fixed value of attenuation.
    3. Both dissipative and reflective attenuators are available only with fixed attenuation.
    4. Both dissipative and reflective attenuators are available with either fixed or variable attenuation.
    Which of the above are correct?


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

  • Correct Answer
  • 4 only 

    Explanation
    Both dissipative and reflective attenuators are available with either fixed or variable attenuation.

    More questions

    • 1. The output frequency of a cycloconverter can be changed by changing the firing angle.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Most of the memory chips in static RAM

    • Options
    • A. do not require any supply
    • B. need 2 V supply
    • C. need 5 V supply
    • D. need 12 V supply
      • Discuss
    • 3. In crystalline solids, atoms are stacked in a regular manner.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The classes of solid dielectrics are

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    • A. A, B, C, D, E, F, H
    • B. A E B F H C D
    • C. Y A E B F H C
    • D. A E B F H C
      • Discuss
    • 5. The unit for mmf is

    • Options
    • A. A
    • B. Wb
    • C. T
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    • 6. In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally

    • Options
    • A. equal
    • B. different
    • C. equal or different
    • D. different but sometimes equal
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    • 7. The real part of complex dielectric constant and tan? for a dielectric are 2.1 and 5 x 10-4 at 100 Hz respectively. The imaginary part of dielectric constant at 100 Hz is

    • Options
    • A. 1.05 x 10-3
    • B. 2.1 x 10-3
    • C. 5 x 10-3
    • D. 1.05 x 10-2
      • Discuss
    • 8. The units for ?r are

    • Options
    • A. Farads
    • B. Farads/m
    • C.
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      • Discuss
    • 9. Tesla is a unit of

    • Options
    • A. flux
    • B. field strength
    • C. flux density
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    • 10. In a receiver, which of the following device has IF input but RF output?

    • Options
    • A. Demodulator
    • B. Loudspeaker
    • C. Audio amplifier
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