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 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 In a direction anti parallel to magnetic field None of these ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Electrical contact materials used in switches, brushes, relay must possess High thermal conductivity and low melting point Low thermal conductivity and high melting point Low thermal conductivity and low melting pointL High thermal conductivity and high melting point High thermal conductivity and low melting point Low thermal conductivity and high melting point Low thermal conductivity and low melting pointL High thermal conductivity and high melting point 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 Debye rule Onne’s rule Curie rule Matthiessen’s rule Debye rule Onne’s rule ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Ferrimagnetic materials have anti parallel orientation of equal moments of permanent dipoles. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Electric dipole moment is expressed in debye unit. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components When a material is in superconducting state and a magnetic field is applied The superconducting property may be affected and resistivity may increase from zero to a low value The superconducting property is not affected The material may become an insulator The superconducting property may be destroyed The superconducting property may be affected and resistivity may increase from zero to a low value The superconducting property is not affected The material may become an insulator The superconducting property may be destroyed ANSWER DOWNLOAD EXAMIANS APP
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