Materials and Components Which of the following are true for relative dielectric constant?1. It is dimensionless.2. It is equal to 1 for vacuum.3. It is equal to 1 for all substances. 1, 2 and 3 1 and 3 only 1 and 2 only 2 and 3 only 1, 2 and 3 1 and 3 only 1 and 2 only 2 and 3 only ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The resistance of a photoconductor Remains constant Increases with increase in light intensity May increase or decrease with increase in light intensity Decreases with increase in light intensity Remains constant Increases with increase in light intensity May increase or decrease with increase in light intensity Decreases with increase in light intensity 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 In the same direction as current None of these In a direction anti parallel to magnetic field Normal to both current and magnetic field In the same direction as current None of these In a direction anti parallel to magnetic field Normal to both current and magnetic field 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 Curie rule Matthiessen’s rule Onne’s rule Debye rule Curie rule Matthiessen’s rule Onne’s rule Debye rule ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The residual resistivity of a binary alloy at 0 K is Difference of residual resistivities of component metals Product of residual resistivities of component metals Sum of residual resistivities of component metals Dependent on the concentration of minor component in the alloy Difference of residual resistivities of component metals Product of residual resistivities of component metals Sum of residual resistivities of component metals Dependent on the concentration of minor component in the alloy ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Which inductor is used at high frequencies? Iron alloy cored Sheet steel cored Ceramic cored Cast iron cored Iron alloy cored Sheet steel cored Ceramic cored Cast iron cored ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS