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 a direction anti parallel to magnetic field None of these In the same direction as current Normal to both current and magnetic field In a direction anti parallel to magnetic field None of these In the same direction as current Normal to both current and magnetic field ANSWER DOWNLOAD EXAMIANS APP
Materials and Components At room temperature the number of conducting electrons in an intrinsic semiconductor Is small as compared to the number of valence electrons Is a very small fraction of the number of valence electrons Is about half the number of valence electrons Is almost equal to the number of valence electrons Is small as compared to the number of valence electrons Is a very small fraction of the number of valence electrons Is about half the number of valence electrons Is almost equal to the number of valence electrons ANSWER DOWNLOAD EXAMIANS APP
Materials and Components A vacant electronic state moves in the same direction as would a positive charge carrier. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The merger of hole and free electron is called Thermal energy Covalent bonding Free electrons Recombination Thermal energy Covalent bonding Free electrons Recombination 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 Onne’s rule Matthiessen’s rule Debye rule Curie rule Onne’s rule Matthiessen’s rule Debye rule ANSWER DOWNLOAD EXAMIANS APP
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 2 and 3 only 1 and 2 only 1, 2 and 3 1 and 3 only 2 and 3 only 1 and 2 only ANSWER DOWNLOAD EXAMIANS APP
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