When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.
When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.
Electrical contact materials used in switches, brushes, relay must possess
Electrical contact materials used in switches, brushes, relay must possess
If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.
If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.
Wood is a diamagnetic material.
Wood is a diamagnetic material.
As the atoms of rare gases become larger, electronic polarizability
As the atoms of rare gases become larger, electronic polarizability
The resistance of a photoconductor
The resistance of a photoconductor
Electric dipole moment is expressed in debye unit.
Electric dipole moment is expressed in debye unit.
The most important set of specifications of transformer oil include
The most important set of specifications of transformer oil include
In van der walls crystals, there exists a high degree of stability of the outer electron shell.
In van der walls crystals, there exists a high degree of stability of the outer electron shell.
Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called
Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is
Which inductor is linear?
Which inductor is linear?
A vacant electronic state moves in the same direction as would a positive charge carrier.
A vacant electronic state moves in the same direction as would a positive charge carrier.
At room temperature the number of conducting electrons in an intrinsic semiconductor
At room temperature the number of conducting electrons in an intrinsic semiconductor
A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.
A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.
As the viscosity of a liquid increases, the relaxation time
As the viscosity of a liquid increases, the relaxation time
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied.
The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as
The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as
The number of protons in a copper atom are
The number of protons in a copper atom are
The residual resistivity of a binary alloy at 0 K is
The residual resistivity of a binary alloy at 0 K is
Many compounds also exhibit semiconducting properties.
Many compounds also exhibit semiconducting properties.
Schrodinger wave equation is a
Schrodinger wave equation is a
With increase in temperature, the electrical conductivity would
With increase in temperature, the electrical conductivity would
A characteristic property of crystal is its periodicity of structure.
A characteristic property of crystal is its periodicity of structure.
An atom of a rare gas is placed is an electric field E. Then
An atom of a rare gas is placed is an electric field E. Then
The dielectric losses do not depend on frequency.
The dielectric losses do not depend on frequency.
Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.
Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles.
Which of the following are true for relative dielectric constant?
1. It is dimensionless.
2. It is equal to 1 for vacuum.
3. It is equal to 1 for all substances.
Which of the following are true for relative dielectric constant?
1. It is dimensionless.
2. It is equal to 1 for vacuum.
3. It is equal to 1 for all substances.
Nickel is a non-magnetic material.
Nickel is a non-magnetic material.
The number of protons in a silicon atom are
The number of protons in a silicon atom are
When a material is in superconducting state and a magnetic field is applied
When a material is in superconducting state and a magnetic field is applied
If a small amount of Cu is added to Ni conductor, then
If a small amount of Cu is added to Ni conductor, then
The materials which become polarized on the application of mechanical stress are called piezoelectric.
The materials which become polarized on the application of mechanical stress are called piezoelectric.
The phenomenon of dielectric hysteresis occurs with
The phenomenon of dielectric hysteresis occurs with
Which inductor is used at high frequencies?
Which inductor is used at high frequencies?
In an intrinsic semiconductor, at a given temperature T
In an intrinsic semiconductor, at a given temperature T
Spontaneous magnetisation is characteristic of ferromagnetic materials.
Spontaneous magnetisation is characteristic of ferromagnetic materials.
For making a capacitor it is better to have a dielectric having
For making a capacitor it is better to have a dielectric having
The merger of hole and free electron is called
The merger of hole and free electron is called
In a metal, the valence electrons
In a metal, the valence electrons
The unit for mmf is
The unit for mmf is
The elements which become superconducting at extremely low temperatures are
The elements which become superconducting at extremely low temperatures are
In solid insulator materials having only one kind of atom, the types of polarization which exist are
In solid insulator materials having only one kind of atom, the types of polarization which exist are
Debye temperature of metals is
Debye temperature of metals is
On the basis of the type of chemical bonds, solids may be classified into
On the basis of the type of chemical bonds, solids may be classified into
The fact that domains exhibits spontaneous magnetisation is
The fact that domains exhibits spontaneous magnetisation is
