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Curie-Weiss law is used to calculate which one of the following?
c Explanation: Curie-Weiss law is given by χe = εr -1. Thus it is used to calculate the electric susceptibility of a material.
c
Explanation: Curie-Weiss law is given by χe = εr -1. Thus it is used to calculate the
electric susceptibility of a material.
See lessCurie-Weiss law is applicable to which of the following materials?
b Explanation: Curie-Weiss law is given by χe = εr -1 = C/(T-θ), where C is the curie constant and θ is the characteristic temperature which is usually a few degrees higher than the curie temperature for ferromagnetic materials.
b
Explanation: Curie-Weiss law is given by χe = εr -1 = C/(T-θ), where C is the curie
constant and θ is the characteristic temperature which is usually a few degrees higher
than the curie temperature for ferromagnetic materials.
See lessDielectric property impacts the behaviour of a material in the presence of electric field. State True/False.
a Explanation: Based on the dielectric property, a material can be classified as piezoelectric, ferroelectric, pyroelectric and anti-ferroelectric materials under the influence of electric field.
a
Explanation: Based on the dielectric property, a material can be classified as
piezoelectric, ferroelectric, pyroelectric and anti-ferroelectric materials under the
influence of electric field.
See lessCompute the refractive index when the dielectric constant is 256 in air.
b Explanation: By Maxwell relation, εr = n 2 , where εro is the dielectric constant at optical frequencies and n is the refractive index.For the given dielectric constant we get n = 16.
b
Explanation: By Maxwell relation, εr = n
2
, where εro is the dielectric constant at optical
frequencies and n is the refractive index.For the given dielectric constant we get n = 16.
See lessIonic non polar solid dielectrics contain more than one type of atoms but no permanent dipoles. State True/False
a Explanation: In ionic crystals, the total polarisation is electronic and ionic in nature. Thus, it implies that it contains more than one type of atom and no permanent dipoles
a
Explanation: In ionic crystals, the total polarisation is electronic and ionic in nature. Thus,
it implies that it contains more than one type of atom and no permanent dipoles
See lessWhich of the following is not an example of elemental solid dielectric?
c Explanation: Elemental solid dielectrics are the materials consisting of single type of atoms. Such materials have neither ions nor permanent dipoles and possess only electronic polarisation. Its examples are diamond, sulphur and germanium.
c
Explanation: Elemental solid dielectrics are the materials consisting of single type of
atoms. Such materials have neither ions nor permanent dipoles and possess only
electronic polarisation. Its examples are diamond, sulphur and germanium.
See lessSolids do not have which type of polarisation?
c Explanation: Solids possess permanent dipole moments. Moreover they do not have junction like semiconductors. Thus, solids neglect the interfacial and space charge polarisation. They possess only electronic, ionic and orientational polarisations
c
Explanation: Solids possess permanent dipole moments. Moreover they do not have
junction like semiconductors. Thus, solids neglect the interfacial and space charge
polarisation. They possess only electronic, ionic and orientational polarisations
See lessIn the given types of polarisation, which type exists in the semiconductor?
d Explanation: The interfacial type of polarisation occurs due to accumulation of charges at the interface in a multiphase material. This interface or junction is found in a semiconductor material.
d
Explanation: The interfacial type of polarisation occurs due to accumulation of charges
at the interface in a multiphase material. This interface or junction is found in a
semiconductor material.
See lessThe total polarisation of a material is the
b Explanation: The total polarisation of a material is given by the sum of electronic, ionic, orientational and interfacial polarisation of the material.
b
Explanation: The total polarisation of a material is given by the sum of electronic, ionic,
orientational and interfacial polarisation of the material.
See lessIn isotropic materials, which of the following quantities will be independent of the direction?
a Explanation: Isotropic materials are those with radiate or absorb energy uniformly in all directions (eg. Isotropic antenna). Thus it is independent of the direction.
a
Explanation: Isotropic materials are those with radiate or absorb energy uniformly in all
directions (eg. Isotropic antenna). Thus it is independent of the direction.
See less