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Home ‣ Electronics and Communication Engineering ‣ Electromagnetic Field Theory See What Others Are Saying!
  • Question

  • A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the value of its Brewster angle is


  • Options
  • A. 0°
  • B. 30°
  • C. 45°
  • D. 60°

  • Correct Answer
  • 60° 

    Explanation
    Brewster angle ? = tan-1 A parallel polarized wave is incident from air into paraffin having relative permittivity 3, the val.

    More questions

    • 1. Assertion (A): For large signal variations an amplifier circuit has to be analysed graphically

      Reason (R): The output characteristics of a transistor is nonlinear.


    • Options
    • A. Both A and R are correct and R is correct explanation for A
    • B. Both A and R are correct but R is not correct explanation for A
    • C. A is correct R is wrong
    • D. A is wrong R is correct
      • Discuss
    • 2. Match the following:

      List I (Functional components) List II (Device)
      A. Error detector 1. Three phase FHP Induction motor
      B. Servo motor 2. Synchro transmitter and control transformer
      C. Amplifier 3. Tacho generator
      D. Feed back 4. Armature controlled FHP dc motor
      5. Amplidyne


    • Options
    • A. A-2, B-4, C-1, D-5
    • B. A-4, B-2, C-5, D-3
    • C. A-2, B-4, C-5, D-3
    • D. A-1, B-2, C-3, D-5
      • Discuss
    • 3. An electron is moving in a circular orbit of radius R at angular velocity ?0 in a field free space. If a magnetic field B is created, the velocity of electron ? will be given by the equation

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 4. Electric dipole moment is usually expressed in debye units. Here, 1 debye unit equals

    • Options
    • A. 3.33 x 10-30 C-m
    • B. 3.33 x 10-30 C-m2
    • C. 3.30 x 10-10 C-m
    • D. 3.33 x 10-10 C-m2
      • Discuss
    • 5. In its lowest state, the electron is bound to the field of proton by an energy equal to

    • Options
    • A. 100.5 eV
    • B. 51.2 eV
    • C. 13.6 eV
    • D. 0.2 eV
      • Discuss
    • 6. 1 Bohr magneton = .

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called

    • Options
    • A. Debye temperature
    • B. Curie temperature
    • C. Neel temperature
    • D. Transition temperature
      • Discuss
    • 8. The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as

    • Options
    • A. Matthiessen's rule
    • B. Debye rule
    • C. Curie rule
    • D. Onne's rule
      • Discuss
    • 9. Magnetisation of a material is the magnetic dipole moment per m3.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Electrical contact materials used in switches, brushes, relay must possess

    • Options
    • A. high thermal conductivity and high melting point
    • B. low thermal conductivity and low melting point
    • C. high thermal conductivity and low melting point
    • D. low thermal conductivity and high melting point
      • Discuss

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