When a ferromagnetic substance is magnetised there are small changes in dimensions. This phenomenon is called

The equation D = ∈₀∈_r E refers only to isotropic materials.

In which of the following semiconductor are holes majority carriers

In elemental dielectrics, the orientation and ionic polarization are absent.

The law that (where K is thermal conductivity, σ is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as