The elements which become superconducting at extremely low temperatures are Ferromagnetic at room temperature Insulators at room temperature Good conductors at room temperature Relatively poor conductors at room temperature TRUE ANSWER : ? YOUR ANSWER : ?
On the basis of the type of chemical bonds, solids may be classified into Ionic crystal, valence crystals and metals Ionic crystals, valence crystals, metal and vander wall crystals Ionic and valence crystals Ionic crystals TRUE ANSWER : ? YOUR ANSWER : ?
Spontaneous magnetisation is characteristic of ferromagnetic materials. False True TRUE ANSWER : ? YOUR ANSWER : ?
Which inductor is linear? Cast iron cored Sheet steel cored Iron alloy cored Air cored TRUE ANSWER : ? YOUR ANSWER : ?
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. 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 : ?
Debye temperature of metals is About 10 K About 2 K About 600 K About 200 K TRUE ANSWER : ? YOUR ANSWER : ?
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 : ?
The fact that domains exhibits spontaneous magnetisation is Second hypothesis is of Weiss Boltzmann’s statistics First hypothesis is of Curie Curie-Weiss law TRUE ANSWER : ? YOUR ANSWER : ?