A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: controllers/home.php

Line Number: 231

A PHP Error was encountered

Severity: Warning

Message: A non-numeric value encountered

Filename: controllers/home.php

Line Number: 237

Electromagnetic Field Thoery - ECE Questions and Answers

Menu
Home / ECE / Electromagnetic Field Thoery :: Section 7

ECE :: Electromagnetic Field Thoery

Electromagnetic Field Thoery - Section 1
Electromagnetic Field Thoery - Section 2
Electromagnetic Field Thoery - Section 3
Electromagnetic Field Thoery - Section 4
Electromagnetic Field Thoery - Section 5
Electromagnetic Field Thoery - Section 6
Electromagnetic Field Thoery - Section 7
Electromagnetic Field Thoery - Section 8
Electromagnetic Field Thoery - Section 9
Electromagnetic Field Thoery - Section 10
Electromagnetic Field Thoery - Section 11
Electromagnetic Field Thoery - Section 12
Electromagnetic Field Thoery - Section 13
Electromagnetic Field Thoery - section-14
Electromagnetic Field Thoery - section-15

  1. When the phase velocity of an EM wave depends on frequency in any medium, the phenomenon is called

    2. A.
    scattering
    B.
    polarization
    C.
    absorption
    D.
    dispersion

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. A hertzian dipole has a radiation pattern with

    3. A.
    a null in the direction of the dipole
    B.
    a null in the plane perpendicular to the dipole
    C.
    a peak in the direction of the dipole
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. Circular polarized waves result when

    4. A.
    magnitudes are the same
    B.
    phases are the same
    C.
    magnitudes are same and phase difference is 90°
    D.
    magnitudes are same and phase difference is zero

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. Permeance is analogue to

    5. A.
    reluctance
    B.
    conductance
    C.
    capacitance
    D.
    resistance

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. Skip distance (D) is

    6. A.
    (D ∝ f)
    B.
    C.
    D = f
    D.
    D < f

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as

    7. A.
    MF
    B.
    VHF
    C.
    VLF
    D.
    HF

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. A rectangular waveguide (2.29 x 1.02) cm operates at a freq. of 11 GHz in TE10 mode. If the maximum potential gradient of the signal is 5 kV/cm, then the maximum power handling capacity of the waveguide will be

    8. A.
    31.11 mW
    B.
    31.11 W
    C.
    31.11 kW
    D.
    31.11 MW

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. A parabolic antenna produces a radiation pattern which is

    9. A.
    circularly polarized
    B.
    highly directional
    C.
    omnidirectional
    D.
    linearly polarized

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. Considerable ionization occurs between the range

    10. A.
    50 km to 400 km
    B.
    100 to 400 km
    C.
    50 km to 250 km
    D.
    10 to 50 km

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. Gain of isotropic antenna is

    11. A.
    10 dB
    B.
    0 dB
    C.
    ∞
    D.
    1 dB

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers