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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. In which mode of circular waveguide does the attenuation continuously decrease as frequency is increased?

    • Options
    • A. TE01
    • B. TE11
    • C. TE05
    • D. TE21
      • 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. If temperature is increased, the temperature coefficient of a metal

    • Options
    • A. increases
    • B. decreases
    • C. may increase or decrease
    • D. remains constant
      • Discuss
    • 4. In an homogeneous dielectric subjected to an electric field E, the dipole moment per unit volume is ?0(?r - 1) E.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The angle ? for a mica capacitor is about

    • Options
    • A. 25°
    • B. 15°
    • C. 5°
    • D. 1°
      • Discuss
    • 6. The quiescent collector current IC, and collector to emitter voltage VCE in a CE connection are the values when

    • Options
    • A. ac signal is zero
    • B. ac signal is low
    • C. ac signal is negative
    • D. either (a) or (b)
      • Discuss
    • 7. Which of the following statement about the amplitude limiter is not valid?

    • Options
    • A. Leak type bias must be used
    • B. Output must be tuned
    • C. The circuit is always biased in class C, by virtue of the leak type bias
    • D. When the input increases past the threshold of limiting, the gain decreases to keep the output constant
      • Discuss
    • 8. Assertion (A): Helium, Argon and Neon are gaseous at room temperature.

      Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
      • Discuss
    • 9. In figure what is value of IC if ?dc = 100. Neglect VBE

    • Options
    • A. 5 mA
    • B. 5 ?A
    • C. 10 mA
    • D. 10 ?A
      • Discuss
    • 10. The law that (where K is thermal conductivity, ? is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as

    • Options
    • A. Lorentz law
    • B. Wiedemann Franz law
    • C. Curie Weiss law
    • D. Kittel law
      • Discuss

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