As regards ferromagnetic Curie temperature Qf and paramagnetic curie temperature

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Question
As regards ferromagnetic Curie temperature Q_f and paramagnetic curie temperature ?
Options
A. Q_f > ?
B. ? > Q_f
C. ? equal to or less than Q_f
D. ? may be equal to less than or more Q_f

Correct Answer

? > Q_f

Materials and Components problems

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1. 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

4. A circular sphere mile is the area of cross-section of a wire
Options
A. having a diameter equal to 1 miles
B. having a radius equal to 1 miles
C. having a circumference equal to 1 miles
D. none of the above

6. In a ferromagnetic material, the internal field seen by a dipole is
Options
A. equal to applied field
B. equal to applied field minus a contribution from neighbouring dipoles
C. equal to applied field plus a contribution from neighbouring dipoles
D. equal to or less than applied field

8. The law that (where K is thermal conductivity, ? is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as
Options
A. Lorentz law
B. Wiedemann Franz law
C. Curie Weiss law
D. Kittel law

9. The chemical properties of atoms are determined by all the electrons and their configuration.
Options
A. True
B. False

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