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Home ‣ Electronics and Communication Engineering ‣ Materials and Components Comments
  • Question

  • The fact that domains exhibits spontaneous magnetisation is


  • Options
  • A. first hypothesis is of Curie
  • B. second hypothesis is of Weiss
  • C. Curie-Weiss law
  • D. Boltzmann's statistics

  • Correct Answer
  • second hypothesis is of Weiss 

    • Materials and Components problems

    Search Results

    • 1. Assertion (A): Dielectric constant is independent of temperature unless the temperature is extremely high.

      Reason (R): For normal temperatures the number of atoms per unit volume is constant.


    • Options
    • A. Both A and R are true and R is correct explanation of A
    • B. Both A and R are true but R is not correct explanation of A
    • C. A is true but R is false
    • D. A is false but R is true
      • Discuss
    • 2. Carbon steel has a residual flux density of 1 Wb/m2.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. As the atoms of rare gases become larger, electronic polarizability

    • Options
    • A. increases
    • B. decreases
    • C. remains the same
    • D. may increase or decrease
      • Discuss
    • 4. A rare gas having N atoms/m3 is subjected to an electric field E. The electric dipole moment per unit volume is proportional to N and E.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The number of protons in a silicon atom are

    • Options
    • A. 4
    • B. 8
    • C. 12
    • D. 14
      • Discuss
    • 6. The number of protons in a copper atom are

    • Options
    • A. 2
    • B. 9
    • C. 11
    • D. 29
      • Discuss
    • 7. The most important set of specifications of transformer oil include

    • Options
    • A. dielectric strength and viscosity
    • B. dielectric strength and flash point
    • C. viscosity and flash point
    • D. flash point and viscosity
      • Discuss
    • 8. If ?p is permanent dipole moment and T is absolute temperature, the orientation polarization of polyatomic gases is

    • Options
    • A. proportional to ?p2T
    • B. proportional to
    • C. proportional to ?p T
    • D. proportional to
      • Discuss
    • 9. We can know the arrangement of atom in a material by studying electron diffraction pattern.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Schrodinger wave equation is partial differential equation.

    • Options
    • A. True
    • B. False
      • Discuss

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