On the basis of the type of chemical bonds, solids may be classified into

Materials and Components
On the basis of the type of chemical bonds, solids may be classified into

Ionic and valence crystals

Ionic crystals

Ionic crystals, valence crystals, metal and vander wall crystals

Ionic crystal, valence crystals and metals

Ionic and valence crystals

Ionic crystals

Ionic crystals, valence crystals, metal and vander wall crystals

Ionic crystal, valence crystals and metals

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Materials and Components
For making a capacitor it is better to have a dielectric having

Permittivity same as that of air

High permittivity

Permittivity which is neither high nor low

Low permittivity

Permittivity same as that of air

High permittivity

Permittivity which is neither high nor low

Low permittivity

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Materials and Components
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.

False

True

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Materials and Components
In an intrinsic semiconductor, at a given temperature T

The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

The number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination

The number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination

Any of the above

The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

The number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination

The number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination

Any of the above

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Materials and Components
The unit for mmf is

A

V

T

Wb

A

V

T

Wb

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Materials and Components
If a small amount of Cu is added to Ni conductor, then

Resistivity of Ni remains the same

Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres

Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni

Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

Resistivity of Ni remains the same

Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres

Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni

Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

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Materials and Components

Materials and Components On the basis of the type of chemical bonds, solids may be classified into

Materials and Components For making a capacitor it is better to have a dielectric having

Materials and Components 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.

Materials and Components In an intrinsic semiconductor, at a given temperature T

Materials and Components The unit for mmf is

Materials and Components If a small amount of Cu is added to Ni conductor, then

Materials and Components
On the basis of the type of chemical bonds, solids may be classified into

Materials and Components
For making a capacitor it is better to have a dielectric having

Materials and Components
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.

Materials and Components
In an intrinsic semiconductor, at a given temperature T

Materials and Components
The unit for mmf is

Materials and Components
If a small amount of Cu is added to Ni conductor, then