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The continuity equation is a combination of which of the two laws?
b Explanation: I = ∫ J.ds is the integral form of Ohm’s law and Div (J) = dq/dt is the Gauss law analogous to D. Through these two equations, we get Div(J) = -dρ/dt. This is the continuity equation.
b
See lessExplanation: I = ∫ J.ds is the integral form of Ohm’s law and Div (J) = dq/dt is the Gauss law analogous to D. Through these two equations, we get Div(J) = -dρ/dt. This is the continuity equation.
Compute the loss factor when the loss tangent is 0.88 and the real part of dielectric is 24.
d Explanation: The loss factor is nothing but the imaginary part of AC dielectric. It is given by, ε“ = ε` tan δ. We get loss factor as 24 x 0.88 = 21.12.
d
See lessExplanation: The loss factor is nothing but the imaginary part of AC dielectric. It is given by, ε“ = ε` tan δ. We get loss factor as 24 x 0.88 = 21.12.
When a dielectric loses its dielectric property, the phenomenon is called
b Explanation: Due to various treatments performed on the dielectric, in order to make it conduct, the dielectric reaches a state, where it loses its dielectric property and starts to conduct. This phenomenon is called as dielectric breakdown.
b
See lessExplanation: Due to various treatments performed on the dielectric, in order to make it conduct, the dielectric reaches a state, where it loses its dielectric property and starts to conduct. This phenomenon is called as dielectric breakdown.
Curie-Weiss law is used to calculate which one of the following?
c) Electric susceptibility Explanation: Curie-Weiss law is given by χe = εr -1. Thus it is used to calculate the electric susceptibility of a material.
c) Electric susceptibility
Explanation: Curie-Weiss law is given by χe = εr -1. Thus it is used to calculate the
See lesselectric susceptibility of a material.
Curie-Weiss law is applicable to which of the following materials?
b) Ferroelectric 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) Ferroelectric
Explanation: Curie-Weiss law is given by χe = εr -1 = C/(T-θ), where C is the curie
See lessconstant and θ is the characteristic temperature which is usually a few degrees higher
than the curie temperature for ferromagnetic materials.
Dielectric property impacts the behaviour of a material in the presence of electric field. State True/False.
a) True 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) True
Explanation: Based on the dielectric property, a material can be classified as
See lesspiezoelectric, ferroelectric, pyroelectric and anti-ferroelectric materials under the
influence of electric field.
Compute the refractive index when the dielectric constant is 256 in air.
16 Explanation: By Maxwell relation, εr = n2, where εro is the dielectric constant at optical frequencies and n is the refractive index.For the given dielectric constant we get n = 16.
16
Explanation: By Maxwell relation, εr = n2, 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) True 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) True
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) Silicon 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) Silicon
Explanation: Elemental solid dielectrics are the materials consisting of single type of
See lessatoms. Such materials have neither ions nor permanent dipoles and possess only
electronic polarisation. Its examples are diamond, sulphur and germanium.
Solids do not have which type of polarisation?
c) Interfacial 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) Interfacial
Explanation: Solids possess permanent dipole moments. Moreover they do not have
See lessjunction like semiconductors. Thus, solids neglect the interfacial and space charge
polarisation. They possess only electronic, ionic and orientational polarisations.