Materials and Components Electrical contact materials used in switches, brushes, relay must possess High thermal conductivity and high melting point High thermal conductivity and low melting point Low thermal conductivity and low melting pointL Low thermal conductivity and high melting point High thermal conductivity and high melting point High thermal conductivity and low melting point Low thermal conductivity and low melting pointL Low thermal conductivity and high melting point ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The merger of hole and free electron is called Covalent bonding Thermal energy Recombination Free electrons Covalent bonding Thermal energy Recombination Free electrons ANSWER DOWNLOAD EXAMIANS APP
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 The resistance of a photoconductor 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 Remains constant Increases with increase in light intensity ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The residual resistivity of a binary alloy at 0 K is Product of residual resistivities of component metals Sum of residual resistivities of component metals Difference of residual resistivities of component metals Dependent on the concentration of minor component in the alloy Product of residual resistivities of component metals Sum of residual resistivities of component metals Difference of residual resistivities of component metals Dependent on the concentration of minor component in the alloy ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Piezoelectricity means the slight change in dimensions of a specimen when an electric field is applied. False True False True ANSWER DOWNLOAD EXAMIANS APP
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