Tabla de Contenidos: “…Electronic polarization -- 6.10 Important requirements of insulators -- (a) Electrical requirements -- (b) Thermal requirements -- (c) Mechanical requirements -- (d) Chemical requirements -- Formulae -- Solved Problems -- Multiple Choice Questions -- Answers -- Review Questions -- Chapter 7: Magnetic Properties -- 7.1 Magnetic permeability -- 7.2 Magnetization (M ) -- 7.3 Origin of magnetic moment-Bohr magneton-electron spin -- (i) Magnetic moment due to orbital motion of electrons and orbital angular momentum -- (ii) Magnetic moment due to spin of the electrons -- (iii) Magnetic moment due to nuclear spin -- 7.4 Classification of magnetic materials -- (i) Diamagnetic material -- (ii) Paramagnetic materials -- (iii) Ferromagnetic materials -- (iv) Anti-ferromagnetic materials -- (v) Ferrimagnetic materials [Ferrites] -- 7.5 Classical theory of diamagnetism [Langevin theory] -- 7.6 Theory of paramagnetism -- 7.7 Domain theory of ferromagnetism -- Effect of temperature -- Experimental evidences for domain structure -- Origin of [Ferromagnetic] domains -- Explanation for origin of domains -- 7.8 Hysteresis curve -- 7.9 Anti-ferromagnetic substances -- 7.10 Ferrimagnetic substances [Ferrites] -- 7.11 Soft and hard magnetic materials -- (a) Soft magnetic materials -- (b) Hard magnetic materials -- Comparison between soft and hard magnetic materials -- 7.12 Applications of ferrites -- Formulae -- Solved Problems -- Multiple Choice Questions -- Answers -- Review Questions -- Chapter 8: Semiconductors -- 8.1 Introduction -- 8.2 Intrinsic semiconductors-carrier concentration -- Electron concentration -- For hole concentration -- To evaluate Fermi energy -- To find intrinsic concentration (ni ) -- 8.3 Electrical conductivity of a semiconductor -- To find energy gap of a semiconductor -- Increase of temperature to double the conductivity…”