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ECE :: Electromagnetic Field Thoery

  1. Which of the following is the reciprocal of Reluctance
  2. A.
    Henry / Meter
    B.
    Henry
    C.
    Meter / Henry
    D.
    Henry-1

  3. Which of the following is the unit for Relative Permeability
  4. A.
    Henry
    B.
    Henry / Meter
    C.
    Henry / Meter2
    D.
    Dimensionless

  5. For a transmission line terminated by a load, the reflection co-efficient magnitude |Γ |and the Voltage standing wave ratio S is related as
  6. A.
    S = 1 / (1 + |Γ |)
    B.
    S = 1 / (1 - |Γ |)
    C.
    S = (1 - |Γ |) / (1 + |Γ |)
    D.
    S = (1 + |Γ |) / (1 - |Γ |)

  7. The equation is known as _________law
  8. A.
    Amperes Law
    B.
    Faraday Law
    C.
    Gauss's Law
    D.
    Biot-Saverts Law

  9. If and in a given material, then the material is said to be
  10. A.
    Linear
    B.
    Homogenous
    C.
    Isotropic
    D.
    Linear & Homogenous

  11. A loop is rotating about y-axis in a magnetic field Then the voltage induced in the loop is due to
  12. A.
    Motional emf
    B.
    Transformer emf
    C.
    A combination of motional & Transformer emf
    D.
    None of these

  13. Which of the following statement is not true of waves in general
  14. A.
    It may be a function of time only
    B.
    It may be sinusoidal or cosinusoidal
    C.
    It may be a function of time and space
    D.
    For practical reasons, it must be finite in extent

  15. The dominant mode of rectangular wave guide is
  16. A.
    TE11
    B.
    TM11
    C.
    TE01
    D.
    TE10

  17. The electric potential due to linear quadrapole varies inversely with
  18. A.
    r
    B.
    r2
    C.
    r3
    D.
    r4

  19. Radiation resistance of a λ /2 dipole is
  20. A.
    73 ohm
    B.
    75 ohm
    C.
    120 ohm
    D.
    377 ohm