The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as Matthiessen’s rule Curie rule Onne’s rule Debye rule TRUE ANSWER : ? YOUR ANSWER : ?
Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied. True False 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 In the same direction as current None of these Normal to both current and magnetic field In a direction anti parallel to magnetic field 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 : ?
Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called Debye temperature Neel temperature Transition temperature Curie temperature TRUE ANSWER : ? YOUR ANSWER : ?
The merger of hole and free electron is called Free electrons Covalent bonding Recombination Thermal energy TRUE ANSWER : ? YOUR ANSWER : ?
The elements which become superconducting at extremely low temperatures are Relatively poor conductors at room temperature Ferromagnetic at room temperature Good conductors at room temperature Insulators at room temperature TRUE ANSWER : ? YOUR ANSWER : ?
Which inductor is used at high frequencies? Sheet steel cored Cast iron cored Iron alloy cored Ceramic cored TRUE ANSWER : ? YOUR ANSWER : ?