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

  • The first and second subscripts in models of circular waveguides depict


  • Options
  • A. the number of full sine wave variations in circumference in direction and Bessel function variations in radial direction respectively
  • B. the Bessel function variations in radial direction and the number of full sine wave variations in circumference direction respectively
  • C. the Bessel function variations in circumference direction and number of full sine wave variations in radial direction respectively
  • D. none of the above

  • Correct Answer
  • the number of full sine wave variations in circumference in direction and Bessel function variations in radial direction respectively 

    • More questions

    • 1. The path length between ports 1 and 2 for the two waves in a hybrid ring is

    • Options
    • A. 1
    • B.
    • C.
    • D.
      • Discuss
    • 2. Match the following:

      List I List II
      A. DMA controller 1. Interface between computer and video display adapter
      B. CKT controller 2. Used to read data directly from disk into directly memory
      C. Interrupt controller 3. Supervises the operation of control signal


    • Options
    • A. A-1, B-2, C-3
    • B. A-2, B-3, C-1
    • C. A-3, B-2, C-1
    • D. A-2, B-1, C-3
      • Discuss
    • 3. In the circuit of figure the voltage across capacitor when switch is closed at t = ? is

    • Options
    • A. 0 V
    • B. 20 V
    • C. very large
    • D. 7.5 V
      • Discuss
    • 4. While selecting a memory chip the feature which should be examined is

    • Options
    • A. capacity
    • B. ac characteristics
    • C. dc characteristics
    • D. all of the above
      • Discuss
    • 5. Calculate wave impedance for TE mode

    • Options
    • A. (377)?
    • B. 226 ?
    • C. ?
    • D. 629 ?
      • Discuss
    • 6. Match the following:

      List I List II
      A. Horn antenna 1. High directivity
      B. Parabolic antenna 2. Very high directivity
      C. Lens antenna 3. Moderate directivity


    • Options
    • A. A-1, B-2, C-3
    • B. A-3, B-2, C-1
    • C. A-3, B-1, C-2
    • D. A-1, B-3, C-2
      • Discuss
    • 7. Assertion (A): A TRIAC is a bidirectional SCR.

      Reason (R): A TRIAC is a four layers 3 terminal device and can conduct in both directions.


    • 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
    • 8. A potential of 7 V is applied to a silicon diode. A resistance of 1 K ohm is also in series with the diode. The current is

    • Options
    • A. 7 mA
    • B. 6.3 mA
    • C. 0.7 mA
    • D. 0
      • Discuss
    • 9. Assertion (A): The turn on time of SCR is about 1 to 4 ms.

      Reason (R): The turn off time of SCR is about 10 to 300 ms.


    • 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
    • 10. A carry look ahead adder is frequently used for addition because

    • Options
    • A. it costs less
    • B. it is faster
    • C. it is more accurate
    • D. is uses fewer gates
      • Discuss

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