The materials which become polarized on the application of mechanical stress are called piezoelectric.

Materials and Components
The materials which become polarized on the application of mechanical stress are called piezoelectric.

False

True

ANSWER DOWNLOAD EXAMIANS APP

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

High permittivity

Permittivity same as that of air

Permittivity which is neither high nor low

Low permittivity

High permittivity

Permittivity same as that of air

Permittivity which is neither high nor low

Low permittivity

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
An atom of a rare gas is placed is an electric field E. Then

The nucleus will be shifted in the direction of E by an amount which is independent of E.

The nucleus will not be shifted.

The nucleus will be shifted in the direction of E by an amount which is proportional to E.

The nucleus will be shifted in a direction opposite to that of E.

The nucleus will be shifted in the direction of E by an amount which is independent of E.

The nucleus will not be shifted.

The nucleus will be shifted in the direction of E by an amount which is proportional to E.

The nucleus will be shifted in a direction opposite to that of E.

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
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.

1 and 2 only

1 and 3 only

1, 2 and 3

2 and 3 only

1 and 2 only

1 and 3 only

1, 2 and 3

2 and 3 only

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components
When a material is in superconducting state and a magnetic field is applied

The superconducting property may be destroyed

The material may become an insulator

The superconducting property may be affected and resistivity may increase from zero to a low value

The superconducting property is not affected

The superconducting property may be destroyed

The material may become an insulator

The superconducting property may be affected and resistivity may increase from zero to a low value

The superconducting property is not affected

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP

Materials and Components

Materials and Components The materials which become polarized on the application of mechanical stress are called piezoelectric.

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

Materials and Components An atom of a rare gas is placed is an electric field E. Then

Materials and Components 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.

Materials and Components When a material is in superconducting state and a magnetic field is applied

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

Materials and Components
The materials which become polarized on the application of mechanical stress are called piezoelectric.

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

Materials and Components
An atom of a rare gas is placed is an electric field E. Then

Materials and Components
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.

Materials and Components
When a material is in superconducting state and a magnetic field is applied

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