Solid State Physics MCQs Question and Answer in Engineering Physics Page-5 section-1

41.
The dielectric constant of a material at optical frequencies is mainly due to

A. ionic polarizability

B. electronic polarizability

C. dipolar polarizability

D. ionic and dipolar polarizabilities

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42.
The temperature (T) dependence of magnetic susceptibility $$\left( \chi \right)$$ of a ferromagnetic substance with Curie temperature (T_c) is given by

A. $$\frac{C}{{T - {T_C}}}$$ , T < T_c

B. $$\frac{C}{{T - {T_C}}}$$ , T > T_c

C. $$\frac{C}{{T + {T_C}}}$$ , T > T_c

D. $$\frac{C}{{T + {T_C}}}$$ , for all temperatures.

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43.
Metallic monovalent sodium crystallizes in body centred cubic structure. If the length of the unit cell is 4 × 10^-8 cm, the concentration of conduction electrons in metallic sodium is

A. 6.022 × 10²³ cm^-3

B. 3.125 × 10²² cm^-3

C. 2.562 × 10²¹ cm^-3

D. 1.250 × 10²⁰ cm^-3

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44.
In an experiment involving a ferromagnetic medium, the following observations were made. Which one of the plots does not correctly represent the property of the medium?

A. Solid State Physics mcq question image

B. Solid State Physics mcq question image

C. Solid State Physics mcq question image

D. Solid State Physics mcq question image

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45.
For a three-dimensional crystal having N primitive unit cells with a basis of p atoms, the number of optical branches is

A. 3

B. 3p

C. 3p - 3

D. 3N - 3p

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46.
Which one of the following statements is not correct about the Brillouin Zones (BZ) of a square lattices with constant a?

A. The first BZ is a square of side 2π/a in k_x - k_y plane

B. The areas of the first BZ and third BZ are the same

C. The k-points are equidistant in k_x as well as in k_y directions

D. The area of the second BZ is twice that of the first BZ

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47.
The kinetic energy of a free electron at a corner of the first Brillouin zone of a two-dimensional square lattice is larger than that of an electron at the mid-point of a side of the zone by a factor b. The value of b is

A. √2

B. 2

C. 4

D. 8

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48.
The distance between the adjacent atomic planes in CaCO₃ is 0.3 nm. The smallest angle of Bragg scattering for 0.03 nm X-ray is

A. 2.9°

B. 1.5°

C. 0.29°

D. 5.8°

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49.
Which one of the following statements about superconductors is not true?

A. A type I superconductor is completely diamagnetic

B. A type II superconductor exhibits Meissner effect upto the second critical magnetic field (H_c₂)

C. A type II superconductor exhibits zero resistance upto the second critical magnetic field

D. Both type I and type II superconductors exhibit sharp fall in resistance at the superconducting transition temperature

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50.
Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R.
Which one of the following statements describes the variations most appropriately?

A. P is for a superconductor and R for a semiconductor

B. Q is for a superconductor and P for a conductor

C. Q is for a superconductor and R for a conductor

D. R is for a superconductor and P for a conductor

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Solid State Physics MCQs Question and Answer in Engineering Physics

41. The dielectric constant of a material at optical frequencies is mainly due to

Answer & Solution

42. The temperature (T) dependence of magnetic susceptibility $$\left( \chi \right)$$ of a ferromagnetic substance with Curie temperature (Tc) is given by

Answer & Solution

43. Metallic monovalent sodium crystallizes in body centred cubic structure. If the length of the unit cell is 4 × 10-8 cm, the concentration of conduction electrons in metallic sodium is

Answer & Solution

44. In an experiment involving a ferromagnetic medium, the following observations were made. Which one of the plots does not correctly represent the property of the medium?

Answer & Solution

45. For a three-dimensional crystal having N primitive unit cells with a basis of p atoms, the number of optical branches is

Answer & Solution

46. Which one of the following statements is not correct about the Brillouin Zones (BZ) of a square lattices with constant a?

Answer & Solution

47. The kinetic energy of a free electron at a corner of the first Brillouin zone of a two-dimensional square lattice is larger than that of an electron at the mid-point of a side of the zone by a factor b. The value of b is

Answer & Solution

48. The distance between the adjacent atomic planes in CaCO3 is 0.3 nm. The smallest angle of Bragg scattering for 0.03 nm X-ray is

Answer & Solution

49. Which one of the following statements about superconductors is not true?

Answer & Solution

50. Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R. Which one of the following statements describes the variations most appropriately?

Answer & Solution

41.
The dielectric constant of a material at optical frequencies is mainly due to

42.
The temperature (T) dependence of magnetic susceptibility $$\left( \chi \right)$$ of a ferromagnetic substance with Curie temperature (T_c) is given by

43.
Metallic monovalent sodium crystallizes in body centred cubic structure. If the length of the unit cell is 4 × 10^-8 cm, the concentration of conduction electrons in metallic sodium is

44.
In an experiment involving a ferromagnetic medium, the following observations were made. Which one of the plots does not correctly represent the property of the medium?

45.
For a three-dimensional crystal having N primitive unit cells with a basis of p atoms, the number of optical branches is

46.
Which one of the following statements is not correct about the Brillouin Zones (BZ) of a square lattices with constant a?

47.
The kinetic energy of a free electron at a corner of the first Brillouin zone of a two-dimensional square lattice is larger than that of an electron at the mid-point of a side of the zone by a factor b. The value of b is

48.
The distance between the adjacent atomic planes in CaCO₃ is 0.3 nm. The smallest angle of Bragg scattering for 0.03 nm X-ray is

49.
Which one of the following statements about superconductors is not true?

50.
Variation of electrical resistivity $$\rho $$ with temperature T of three solids is sketched (on different scales) in the figure, as curves P, Q and R.
Which one of the following statements describes the variations most appropriately?