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Entry Test MCQ :: Physics Of Solids


21.  Coercive force is the force which opposes
A. Demagnetization B. Breakage
C. Extension D. Surface cracking

22.  Materials in which valence electrons are tightly bound to their atoms at low temperature are called
A. Semi conductor B. Super conductors
C. Insulators D. Conductor

23.  The bulk properties of materials such as their mode of fracture can be related to their
A. Polymerization B. Cleavage
C. Microstructure D. Dislocation

24.  The angular position of cells remains the same for a sample of a crystal. This property is called
A. Isotropy B. Cleavage
C. Homogeneity D. The external symmetry of form

25.  The breaking of crystals along definite direction is called
A. Cleavage B. Symmetry
C. Isotropy D. Homogeneity

26.  If the density of atoms remain same along any direction in a crystal is called
A. Symmetry B. Homogeneity
C. Isotropy D. Cleavage

27.  In simple cube one atom or molecule lies at its
A. Force corners B. Nine corners
C. Eight corners D. Six corners

28.  The band theory of solids explains satisfactorily the nature of
A. Electrical insulators alone B. Electrical conductors alone
C. Electrical semi conductors alone D. All of the above

29.  A vacant or partially filled band is called
A. Conduction band B. Valence band
C. Forbidden band D. Empty band

30.  A completely filled band is called
A. Conduction band B. Valence band
C. Forbidden band D. Core band




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