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

  • Assertion (A): Artificial transmission lines are frequently used in laboratories.

    Reason (R): An artificial transmission line can be used to represent an actual line and can also be used as a delay circuit, as attenuator, as filter network etc.


  • Options
  • A. Both A and R are correct and R is correct explanation of A
  • B. Both A and R are correct but R is not correct explanation of A
  • C. A is correct but R is wrong
  • D. A is wrong but R is correct

  • Correct Answer
  • Both A and R are correct and R is correct explanation of A 

    Explanation
    Artificial transmission lines have many applications. One of the applications is to simulate an actual line in the laboratory.

    More questions

    • 1. Assertion (A): If the duty cycle of chopper is low the current would not become discontinuous

      Reason (R): If the time constant L/R of the load in chopper is low the current may become discontinuous.


    • Options
    • A. Both A and R are correct and R is correct explanation of A
    • B. Both A and R correct but R is not correct explanation of A
    • C. A is correct but R is wrong
    • D. A is wrong but R is correct
      • Discuss
    • 2. For a transmission line open circuit and short circuit impedances are 20 ? and 5 ?. Then characteristic impedance is

    • Options
    • A. 100 ?
    • B. 50 ?
    • C. 25 ?
    • D. 10 ?
      • Discuss
    • 3. When subjected to alternating stresses, an insulating material is characterised by complex dielectric constant ?'r - j?"r . In such materials, the dielectric losses under alternating stress is proportional

    • Options
    • A. ?"r
    • B. both ?'r and ?"r
    • C. ?'r
    • D. (?"r)2
      • Discuss
    • 4. A unity feedback system has open loop transfer function The closed loop transfer function is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. If a capacitor C having selectivity factor Q is scaled down in all its dimensions by a factor K without any altering the dielectric material, the new capacitor will have capacitance and selectivity as

    • Options
    • A. C,
    • B. , Q
    • C. ,
    • D. C, K
      • Discuss
    • 6. The orientation polarization is

      1. directly proportional to temperature
      2. inversely proportional to temperature
      3. inversely proportional to square of permanent dipole moment
      4. directly proportional to square of permanent dipole moment.
      Which of the above are correct?

    • Options
    • A. 1 and 3 only
    • B. 2 and 3 only
    • C. 1 and 4 only
    • D. 2 and 4 only
      • Discuss
    • 7. An electron in a homogeneous magnetic field and having velocity perpendicular to the direction of field moves

    • Options
    • A. perpendicular to the field
    • B. along the field
    • C. along a straight line inclined at 45° to field
    • D. in a circular path
      • Discuss
    • 8. Which capacitor-store higher amount of energy?

    • Options
    • A. Air capacitor
    • B. Paper capacitor
    • C. Mica capacitor
    • D. Plastic film capacitor
      • Discuss
    • 9. If the radius of electron cloud around the nucleus of a rare gas atom is R, the electronic polarizability of the atom is porportional to

    • Options
    • A. R
    • B. R2
    • C. R3
    • D.
      • Discuss
    • 10. An electron in a metal suffers collision and if the probability of it being scattered over an angle d? is 2p P(?) sin ? d? where P(?) is an arbitrary function of scattering angle ?, then

    • Options
    • A. 2pP(?) sin ? d? = 0
    • B. 2pP(?) sin ? d? = 2
    • C. 2pP(?) sin ? d? = -1
    • D. 2pP(?) sin ? d? = 1
      • Discuss

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