Materials and Components When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability. False True False True ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The elements which become superconducting at extremely low temperatures are Ferromagnetic at room temperature Good conductors at room temperature Relatively poor conductors at room temperature Insulators at room temperature Ferromagnetic at room temperature Good conductors at room temperature Relatively poor conductors at room temperature Insulators 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 For making a capacitor it is better to have a dielectric having Permittivity same as that of air Permittivity which is neither high nor low High permittivity Low permittivity Permittivity same as that of air Permittivity which is neither high nor low High permittivity Low permittivity 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 2 only 2 and 3 only 1 and 3 only 1, 2 and 3 1 and 2 only 2 and 3 only 1 and 3 only ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The merger of hole and free electron is called Free electrons Thermal energy Recombination Covalent bonding Free electrons Thermal energy Recombination Covalent bonding ANSWER DOWNLOAD EXAMIANS APP
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