Elements of field theory, Maxwell's equations for the electromagnetic field and their application to the description of electromagnetic waves, stationary electric and magnetic fields are described. Numerical methods of solving the Laplace and Poisson equations, methods of modeling the processes of motion of charged particles in electric and magnetic fields are considered Designed for independent work of postgraduate students studying in the areas of training 03. 06. 01 - Physics and astronomy and students of the discipline "Modeling of physical processes" . Can be used by graduate students and students of other fields of study and specialties.