At room temperature the number of conducting electrons in an intrinsic semiconductor 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 Is a very small fraction of the number of valence electrons TRUE ANSWER : ? YOUR ANSWER : ?
A vacant electronic state moves in the same direction as would a positive charge carrier. False True TRUE ANSWER : ? YOUR ANSWER : ?
A leakage capacitor can be represented by a capacitance C and resistance R in parallel C. False True TRUE ANSWER : ? YOUR ANSWER : ?
Hall effect is observed in a specimen (metal or semi conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is Normal to both current and magnetic field In a direction anti parallel to magnetic field None of these In the same direction as current TRUE ANSWER : ? YOUR ANSWER : ?
As the viscosity of a liquid increases, the relaxation time First decreases then increases Increases Remains constant Decreases TRUE ANSWER : ? YOUR ANSWER : ?
Which inductor is used at high frequencies? Sheet steel cored Iron alloy cored Cast iron cored Ceramic cored TRUE ANSWER : ? YOUR ANSWER : ?
In van der walls crystals, there exists a high degree of stability of the outer electron shell. False True TRUE ANSWER : ? YOUR ANSWER : ?