Engineering Physics Mid - I, January - 2015

1.In an ionic bond the nature of bonding is spherical charge distribution, so it is
  • Directional
  • Non-Directional
  • Distributional
  • All
Answer: B
2.Which of the properties are consisted for the Ionic crystals?
  • They are easily soluble in Polar Solvent like (H2O)
  • Their solution conduct electricity
  • They are rigid and possess high melting point
  • All
Answer: D
3.In a hydrogen bonding of H2O molecule, the negatively charged end of the one molecule will be weakly attracted to the positively charged end of the another molecule because
  • The charges are small
  • The charge transfer is small
  • The charge transfer is higher
  • None
Answer: B
4.Space lattice is an _________
  • Arrangement of all atoms
  • Only geometrical arrangement of lattice point.
  • Arrangement of atoms with basis.
  • None
Answer: B
5.Pick the correct option for triclinic or asymmetric crystal structure
  • a ≠ b ≠ c, α ≠ β ≠ ν ≠ 900
  • a = b = c, α = β = ν = 900.
  • a = b ≠ c, α = β ≠ ν ≠ 900.
  • a ≠ b = c, α ≠ β = ν ≠ 900.
Answer: A
6.The condition for the diffraction is that the wave length of the radiation should be
  • Less than ‘d’
  • Greater than ‘d’
  • Equal to ‘d’
  • Independent on ‘d’
Answer: B
7.The continuous X-rays are used in the following method
  • Debye-Scherrer’s method
  • Powder method
  • Laue method
  • all
Answer: C
8.Laue method is used for the determination of
  • Crystal structure
  • Electron charge distribution
  • Unit cell
  • Values of primitives
Answer: B
9.When Frankel defects are formed in the crystal, the density of the crystal
  • Increases
  • Reduces
  • No change
  • depends on temperature
Answer: C
10.In a crystal, if a closed Burger’s circuit is formed, it means
  • Defected crystal
  • Completely damaged crystal
  • Partially defective
  • Ideal crystal
Answer: D
11.The bond present in diamond is ________
Answer: Covalent bond
12.The equation, which is resultant for attraction and repulsion in the formation of bond is ___________
Answer:
13.If a plane is parallel to one of the crystallographic axes, then the plane intersects that axis at infinity and the miller indices along that direction is ____
Answer: zero
14.The given equation for the ratio of miller indices d100:d110:d111= √6: √3: √2 which represents ___________ cubic
Answer: Simple
15.The Bragg’s law equation 2dSinθ=nλ is formed with waves which can meet the condition of _______________ interference
Answer: Constructive
16.X-rays of wavelength 1.541 Å are diffracted by (111) planes in a crystal at an angle 30° in the first order. Then the inter-planar spacing d = _____ Å.
Answer: 2.67
17.Substitutional defects are will be forming when ____ pairs are missed
Answer: ion
18.Ionization energy of the sodium atom & electron affinity of the Chlorine atom is ____ eV respectively.
Answer: 5.1 & 3.6
19.Schottky & Frankel defects are called as _______ defect
Answer: Intrinsic
20.If Burger vector is perpendicular to the dislocation line then it is _________ dislocation.
Answer: Edge