Which inductor is used at high frequencies? Sheet steel cored Ceramic cored Cast iron cored Iron alloy cored 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 crystals Ionic and valence crystals TRUE ANSWER : ? YOUR ANSWER : ?
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied. False True 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 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 TRUE ANSWER : ? YOUR ANSWER : ?
With increase in temperature, the electrical conductivity would Decrease in metals but increase in intrinsic semiconductor Decrease in metals as well as in intrinsic semiconductor Increase in metals but decrease in intrinsic semiconductor Increase in metals as well as in intrinsic semiconductor TRUE ANSWER : ? YOUR ANSWER : ?
As the atoms of rare gases become larger, electronic polarizability May increase or decrease Decreases Increases Remains the same TRUE ANSWER : ? YOUR ANSWER : ?
In solid insulator materials having only one kind of atom, the types of polarization which exist are Electronic only Electronic, ionic and permanent Electronic and ionic TRUE ANSWER : ? YOUR ANSWER : ?