A. Symmetry
B. Homogeneity
C. Isotropy
D. Cleavage
Related Mcqs:
- To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?
A. 2
B. 3
C. 4
D. 5 - To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?
A. 2
B. 3
C. 4
D. 5 - If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?
A. West
B. North
C. Down
D. Up - 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 - 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 - Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
A. 4 x 10-10 m
B. 2 x 10-10 m
C. 0.02×10-10m
D. 20×10-10m - A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ?
A. None
B. 1
C. 2
D. 3 - In Davisson-Germer experiment the diffracted proton from crystal shows______________?
A. Particle property
B. Wave property
C. Light property
D. Quantum property - X-rays are diffracted by a crystal but not by a diffraction grating because_____________?
A. The ions in a crystal are well arranged
B. The lines in a diffraction grating cannot reflect X-rays.
C. The penetration power of X-rays is high in a diffraction grating
D. The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal - Semi-conductors with donor atoms and free electrons belong to the type________________?
A. n
B. p
C. mix
D. any of above
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