If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant. True False TRUE ANSWER : ? YOUR ANSWER : ?
At room temperature the number of conducting electrons in an intrinsic semiconductor Is a very small fraction of the number of valence electrons Is small as compared to the number of valence electrons Is about half the number of valence electrons Is almost equal to the number of valence electrons TRUE ANSWER : ? YOUR ANSWER : ?
The merger of hole and free electron is called Covalent bonding Thermal energy Recombination Free electrons TRUE ANSWER : ? YOUR ANSWER : ?
Debye temperature of metals is About 2 K About 200 K About 600 K About 10 K TRUE ANSWER : ? YOUR ANSWER : ?
A characteristic property of crystal is its periodicity of structure. True False TRUE ANSWER : ? YOUR ANSWER : ?
The materials which become polarized on the application of mechanical stress are called piezoelectric. False True TRUE ANSWER : ? YOUR ANSWER : ?
The elements which become superconducting at extremely low temperatures are Good conductors at room temperature Insulators at room temperature Relatively poor conductors at room temperature Ferromagnetic at room temperature TRUE ANSWER : ? YOUR ANSWER : ?
As the viscosity of a liquid increases, the relaxation time Remains constant Decreases Increases First decreases then increases TRUE ANSWER : ? YOUR ANSWER : ?
In van der walls crystals, there exists a high degree of stability of the outer electron shell. True False TRUE ANSWER : ? YOUR ANSWER : ?