The units for ∈r are

More Questions from Materials and Components

• A piece of copper and another piece of Germanium are cooled from 30°C to 80 K. The resistance of
• Magnetic hysteresis phenomenon is explained by
• The relative permeability of a ferromagnetic material is
• Some ceramic materials become superconducting
• As the temperature of semiconductor is increased
• For an insulating material, dielectric strength and dielectric losses should be
• Macroscopic quantities of a given material
• Assertion (A): Ferrites are very useful at very high frequencies. Reason (R): Ferrites have high permeability and high resistivity.
• If v is velocity of electron, ε0 is absolute permittivity, m is mass of electron, e is charge on electron and r is the radius of orbit of electron in hydrogen atom, the stability of orbit requires the following equation to be satisfied
• Assertion (A): For a dielectric, P = ∈0(∈r - 1) E. Reason (R): Dipole moment per unit volume is called polarization of dielectric.

Discussion & Comments