The most important set of specifications of transformer oil include dielectric strength and flash point dielectric strength and viscosity flash point and viscosity viscosity and flash point 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 the direction of E by an amount which is independent of E. The nucleus will be shifted in a direction opposite to that of E. The nucleus will not be shifted. TRUE ANSWER : ? YOUR ANSWER : ?
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 Any of the above 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 TRUE ANSWER : ? YOUR ANSWER : ?
With increase in temperature, the electrical conductivity would Decrease in metals but increase in intrinsic semiconductor Increase in metals but decrease in intrinsic semiconductor Increase in metals as well as in intrinsic semiconductor Decrease in metals as well as in intrinsic semiconductor TRUE ANSWER : ? YOUR ANSWER : ?
The merger of hole and free electron is called Covalent bonding Recombination Free electrons Thermal energy TRUE ANSWER : ? YOUR ANSWER : ?
Spontaneous magnetisation is characteristic of ferromagnetic materials. False True TRUE ANSWER : ? YOUR ANSWER : ?
At room temperature the number of conducting electrons in an intrinsic semiconductor Is about half the number of valence electrons Is small as compared to the number of valence electrons Is almost equal to the number of valence electrons Is a very small fraction of the number of valence electrons TRUE ANSWER : ? YOUR ANSWER : ?