Materials and Components The materials which become polarized on the application of mechanical stress are called piezoelectric. True False True False ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The elements which become superconducting at extremely low temperatures are Insulators at room temperature Relatively poor conductors at room temperature Ferromagnetic at room temperature Good conductors at room temperature Insulators at room temperature Relatively poor conductors at room temperature Ferromagnetic at room temperature Good conductors at room temperature ANSWER DOWNLOAD EXAMIANS APP
Materials and Components Spontaneous magnetisation is characteristic of ferromagnetic materials. True False True False ANSWER DOWNLOAD EXAMIANS APP
Materials and Components As the atoms of rare gases become larger, electronic polarizability Decreases May increase or decrease Increases Remains the same Decreases May increase or decrease Increases Remains the same 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 Matthiessen’s rule Onne’s rule Curie rule Debye rule Matthiessen’s rule Onne’s rule Curie 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 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 High thermal conductivity and low melting point Low thermal conductivity and high melting point ANSWER DOWNLOAD EXAMIANS APP
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