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In the given types of polarisation, which type exists in the semiconductor?
d) Interfacial or space charge Explanation: The interfacial type of polarisation occurs due to accumulation of chargesat the interface in a multiphase material. This interface or junction is found in a semiconductor material.
d) Interfacial or space charge
Explanation: The interfacial type of polarisation occurs due to accumulation of chargesat 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) Sum of all types of polarisation Explanation: The total polarisation of a material is given by the sum of electronic, ionic, orientational and interfacial polarisation of the material.
b) Sum of all types of polarisation
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) Permittivity 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) Permittivity
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 lessCalculate the polarisation vector in air when the susceptibility is 5 and electric field is 12 units.
c) 60 Explanation: The polarisation vector is given by, P = ε0 x χe x E, where χe = 5 and ε0 =12. On substituting, we get P = 1 x 5 x 12 = 60 units.
c) 60
Explanation: The polarisation vector is given by, P = ε0 x χe x E, where χe = 5 and ε0 =12. On substituting, we get P = 1 x 5 x 12 = 60 units.
See lessCalculate the energy stored per unit volume in a dielectric medium due to polarisation when P = 9 units and E = 8 units.
c) 36 Explanation: The energy stored per unit volume in a dielectric medium is given by, W = 0.5 X PE = 0.5 X 9 X 8 = 36 units.
c) 36
Explanation: The energy stored per unit volume in a dielectric medium is given by, W = 0.5 X PE = 0.5 X 9 X 8 = 36 units.
See lessPolarizability is defined as the
b) Ratio of dipole moment to electric field Explanation: Polarizability is a constant that is defined as the ratio of elemental dipole moment to the electric field strength.
b) Ratio of dipole moment to electric field
Explanation: Polarizability is a constant that is defined as the ratio of elemental dipole
See lessmoment to the electric field strength.
Calculate the polarisation vector of the material which has 100 dipoles per unit volume in a volume of 2 units.
a) 200 Explanation: Polarisation vector P = N x p, where N = 100 and p = 2. On substituting we get P = 200 units.
a) 200
Explanation: Polarisation vector P = N x p, where N = 100 and p = 2. On substituting we get P = 200 units.
See lessThe best definition of polarisation is
b) Electric dipole moment per unit volume Explanation: The polarisation is defined mathematically as the electric dipole moment per unit volume. It is also referred to as the orientation of the dipoles in the direction of applied electric field.
b) Electric dipole moment per unit volume
Explanation: The polarisation is defined mathematically as the electric dipole moment
See lessper unit volume. It is also referred to as the orientation of the dipoles in the direction of applied electric field.
The intrinsic impedance of free space is given by
d) 377 ohm Explanation: The intrinsic impedance is given by η = √(μo/εo) ohm. Here εo = 8.854 x 10- 12 and μo = 4π x 10-7. On substituting the values, we get η = 377 ohm.
d) 377 ohm
Explanation: The intrinsic impedance is given by η = √(μo/εo) ohm. Here εo = 8.854 x 10-
See less12 and μo = 4π x 10-7.
On substituting the values, we get η = 377 ohm.
If the intrinsic angle is 20, then find the loss tangent.
b) tan 40 Explanation: The loss tangent is given by tan 2θn, where θn = 20. Thus the loss tangent will be tan 40.
b) tan 40
Explanation: The loss tangent is given by tan 2θn, where θn = 20. Thus the loss tangent will be tan 40.
See less