Training Manual . — Minsk: BNTU, 2008. — 46 s. The manual examines the electrical properties of metals and semiconductors, as well as provides the necessary information about quantum electronic theory. Physical principles of operation of some semiconductor devices are also considered. The material is presented in the scope of the physics course program for a technical university and will assist students in mastering the lecture course, as well as in preparing for the performance of laboratory work of a physical workshop on this section of physics. Elements of Quantum Electronic Theory of Metals and Semiconductors . Limits of applicability of classical electronic theory of metals . Metals, Semiconductors and Dielectrics . Electronic gas. Distribution of electrons by their energies. Internal energy and heat capacity of electron gas in metals. Electrical conductivity of metals. Superconductivity . Electrical conductivity of semiconductors. Own conductivity of semiconductors. Impurity conductivity of semiconductors. Electron-hole transition. Pn-transition in case of imbalance with the external electric field. Voltamper characteristic (VAC) of p-n-transition. Semiconductor devices. Transistors . Internal photoelectric effect in semiconductors. Photoconductivity of semiconductors. Photoeffect in p-n-junctionP-n-junction in the absence of lightingP-n-junction in lighting. Voltamper characteristics of p-n transition in lighting. Literature