As the atoms of rare gases become larger, electronic polarizability May increase or decrease Decreases Increases Remains the same TRUE ANSWER : ? YOUR ANSWER : ?
At room temperature the number of conducting electrons in an intrinsic semiconductor Is almost equal to the number of valence electrons Is small as compared to the number of valence electrons Is about half the number of valence electrons Is a very small fraction of the number of valence electrons TRUE ANSWER : ? YOUR ANSWER : ?
On the basis of the type of chemical bonds, solids may be classified into Ionic and valence crystals Ionic crystals, valence crystals, metal and vander wall crystals Ionic crystals Ionic crystal, valence crystals and metals TRUE ANSWER : ? YOUR ANSWER : ?
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 : ?
Spontaneous magnetisation is characteristic of ferromagnetic materials. True False TRUE ANSWER : ? YOUR ANSWER : ?
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 proportional to E. The nucleus will be shifted in a direction opposite to that of E. The nucleus will not be shifted. The nucleus will be shifted in the direction of E by an amount which is independent of E. TRUE ANSWER : ? YOUR ANSWER : ?
A vacant electronic state moves in the same direction as would a positive charge carrier. True False TRUE ANSWER : ? YOUR ANSWER : ?
Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles. False True TRUE ANSWER : ? YOUR ANSWER : ?
The most important set of specifications of transformer oil include flash point and viscosity viscosity and flash point dielectric strength and flash point dielectric strength and viscosity TRUE ANSWER : ? YOUR ANSWER : ?
Debye temperature of metals is About 200 K About 10 K About 2 K About 600 K TRUE ANSWER : ? YOUR ANSWER : ?