Menu
Home / ECE / Microwave Communication :: Section 5

ECE :: Microwave Communication

Microwave Communication - Section 1
Microwave Communication - Section 2
Microwave Communication - Section 3
Microwave Communication - Section 4
Microwave Communication - Section 5
Microwave Communication - Section 6
Microwave Communication - Section 7
Microwave Communication - Section 8

  1. In a magnetron the magnetic flux density is of the order of

    2. A.
    1 mWb/s
    B.
    1 Wb/m2
    C.
    106 m/s
    D.
    1012 m/s

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. For a directional coupler the power is in the ratio of

    3. A.
    40 dB
    B.
    30 dB
    C.
    20 dB
    D.
    10 dB

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. As regards rectangular and circular waveguides

    4. A.
    both have infinite set of TE and TM modes
    B.
    rectangular waveguide has infinite TE and TM modes but not the circular waveguide
    C.
    circular waveguide has infinite TE and TM modes but not the rectangular waveguide
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. In a high frequency coaxial line and the length of line characteristic impedance is a function of

    5. A.
    properties of insulating material only
    B.
    inner and outer conductor radius only
    C.
    both (a) and (b)
    D.
    neither (a) nor (b)

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. Assertion (A): In TE10 mode the cutoff frequency of rectangular waveguide is where a is the broad dimension and c is velocity of light.

    Reason (R): TE10 mode is the dominant mode in rectangular waveguide.

    6. 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

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. The usable bandwidth of ridge wave guide

    7. A.
    is lower than that of rectangular waveguide
    B.
    is higher than that of rectangular waveguide
    C.
    is almost same as that of rectangular waveguide
    D.
    is very small as compared to that of rectangular waveguide

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. Assertion (A): In TE mode for rectangular waveguide.

    Reason (R): In TM mode for rectangular waveguide.

    8. 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

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. The attenuation characteristics of a loaded line is similar to that of

    9. A.
    low pass filter
    B.
    high pass filter
    C.
    band pass filter
    D.
    band stop filter

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. A microstrip line has ∈r = 9. The normalised wavelength is about

    10. A.
    10
    B.
    2
    C.
    1
    D.
    0.4

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. If the repeller voltage in a klystron oscillator is increased the transit time of electron

    11. A.
    will be increased
    B.
    will be decreased
    C.
    will remain the same
    D.
    either (a) or (b)

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers