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# Elektřina a magnetismus

**Course:** Electricity and magnetism

**Department/Abbreviation:** KEF/EMGU

**Year:** 2016 2017

**Guarantee:** 'doc. RNDr. Roman Kubínek, CSc.'

**Annotation:** The subject "Electricity and Magnetism" is based on lectures, numerical ecercises and practical training in laboratory. Lectures consist of historical findings and they are evolved on the basis of recent physics. Electrical and magnetical phenomenon will presented as associated with electromagnetic field. The understanding of electrical a magnetical phenomenon and their physical context with chemistry, biology and mathematics is crucial competence in this education.

**Course review:**

Electrostatic field on vacuum - Coulomb Law and its application, principle of superposition, description of electrostatic field.
Electrostatic field in a dielectric matter - polarization of a dielectric matter, vector of polarization, dielectric susceptibility and relative permittivity, vector of electric induction, generalized Gauss theorem, vectors of electric field intensity and induction at the interface of two dielectric materials, dielectric materials and their uses, energy of electrostatic field, electrostatic measuring devices
Steady electric current - types of electric current, magnitude of electric current, density of electric current, equation of continuity.
Stationary magnetic field - basic magnetic phenomena.
Magnetic field in matter medium - diamagnetic, paramagnetic and ferromagnetic materials, vector of magnetization and magnetic polarization, magnetic circuit
Non-stationary electromagnetic field.
Basic characteristics of alternating electric current and voltage.
Electric machines - transformers, generators and electromotors, three-phase electric current, rotating magnetic field, three-phase electromotors.
Electromagnetic oscillations and waves .
Experimental tasks:
Circuit components in DC electric circuits - behaviour of resistors, capacitors and coils, methods of solving of electrical circuits, resistor bridges
Circuit components in AC electric circuits - behaviour of resistors, capacitors and coils, measurements of capacitances, solving of electrical circuits and principle of superposition
Nonlinear and controlled electrical components - characteristics of varistors, thermistors, diodes and light bulbs, contact resistance
Basic properties of RLC electrical circuits - voltage on individual circuit components, currents in AC electrical circuits, power in AC electrical circuits, simulation software programmes
Investigation of frequency properties of resonant electrical circuits - serial and parallel resonance, simulation software programmes
Work with oscilloscope - basic operations of oscilloscope, characteristics of signals, True RMS values, Lissajous curves and measurement of phase shifts
Magnetic circuit and magnetization curves - measurement of hysteresis loops, transformers, power losses in magnetic circuits

Návod do praktik (PDF 2,3 MiB)

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