Materials and Components The materials which become polarized on the application of mechanical stress are called piezoelectric. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Which inductor is used at high frequencies? Iron alloy cored Cast iron cored Ceramic cored Sheet steel cored Iron alloy cored Cast iron cored Ceramic cored Sheet steel cored ANSWER DOWNLOAD EXAMIANS APP
Materials and Components 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 None of these In the same direction as current In a direction anti parallel to magnetic field Normal to both current and magnetic field None of these In the same direction as current In a direction anti parallel to magnetic field Normal to both current and magnetic field ANSWER DOWNLOAD EXAMIANS APP
Materials and Components For making a capacitor it is better to have a dielectric having Permittivity which is neither high nor low Low permittivity High permittivity Permittivity same as that of air Permittivity which is neither high nor low Low permittivity High permittivity Permittivity same as that of air ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The rule that resistivity of conductors can be separated into two parts viz. temperature independent and temperature dependent is known as Onne’s rule Curie rule Matthiessen’s rule Debye rule Onne’s rule Curie rule Matthiessen’s rule Debye rule ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Electrical contact materials used in switches, brushes, relay must possess Low thermal conductivity and low melting pointL High thermal conductivity and low melting point High thermal conductivity and high melting point Low thermal conductivity and high melting point Low thermal conductivity and low melting pointL High thermal conductivity and low melting point High thermal conductivity and high melting point Low thermal conductivity and high melting point ANSWER DOWNLOAD EXAMIANS APP
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