General concepts about electromagnetic field – Maxwell equations, potentials of electromagnetic field, some general theorems of electromagnetic field: superposition theorem, energy distribution theorem, Poynting theorem, equivalence theorem. Electrostatic field – conductors and dielectrics in electrostatic field, methods for solving electrostatic field. Electric field of time constant currents – Duality of time constant current field with electrostatic field, theorem on characters – shoulder straps, basic concepts on relaxation and diffusion currents. Time constant magnetic field – Duality of time constant magnetic field with electrostatic field, force and torque on the current distribution in the foreign magnetic field, methods for solving the time constant magnetic field. Slow time variable electromagnetic field – definition of the slow time variable electromagnetic field, electromagnetic induction and examples of its application, mutual and self, internal and external inductance, energy and force of static and quasistatic magnetic field, skin effect and proximity effect.