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
Materials and Components As the viscosity of a liquid increases, the relaxation time First decreases then increases Decreases Remains constant Increases First decreases then increases Decreases Remains constant Increases ANSWER DOWNLOAD EXAMIANS APP
Materials and Components The fact that domains exhibits spontaneous magnetisation is Curie-Weiss law First hypothesis is of Curie Boltzmann’s statistics Second hypothesis is of Weiss Curie-Weiss law First hypothesis is of Curie Boltzmann’s statistics Second hypothesis is of Weiss 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 about half the number of valence electrons Is almost equal to the number of valence electrons Is a very small fraction of the number of valence electrons Is small as compared to the number of valence electrons Is about half the number of valence electrons Is almost equal to the number of valence electrons Is a very small fraction of the number of valence electrons ANSWER DOWNLOAD EXAMIANS APP
Materials and Components If a small amount of Cu is added to Ni conductor, then Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni remains the same Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni Resistivity of Ni remains the same Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects ANSWER DOWNLOAD EXAMIANS APP
Materials and Components As the atoms of rare gases become larger, electronic polarizability Decreases Remains the same Increases May increase or decrease Decreases Remains the same Increases May increase or decrease ANSWER DOWNLOAD EXAMIANS APP
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