Three-phase circuits of voltage supplies are the three connected voltage supplies, with the same magnitude of amplitude and frequency, but shifted to 120 grad.…
Category: Learning
Periodic non-sinusoidal currents in linear circuits
Periodic non-sinusoidal currents and voltages are those that change in a periodical non-sinusoidal way. It may happen when the source is generating non-sinusoidal signals, and…
Transient processes in linear circuits
Transient processes in electrical circuits are the processes of transition from one work regime to another, that differ with parameters. Transient processes are caused…
Non-linear DC electric circuits
Non-linear electric circuits contain non-linear components. Non-linear electric components are characterised with non-linear volt-ampere characteristics, as depicted on the figure below. Non-linear components can…
Magnetic circuits
Magnetic circuit is a set of components, combined in one circuit, that create a magnetic field loop. In calculating magnetic circuits we must remember…
Non-linear AC circuits
Non-linear AC circuits are AC circuits containing non-linear components. Nonlinear components can be resistive, capacitive, and inductive. Non-linear resistors can be inertial, and non-inertial.…
Optical and photoelectrical properties of semiconductors
Light absorption When light penetrates the semiconductor, it starts the process of exchanging energy with crystalline lattice. Let us determine I as a light…
Thermoelectrical phenomena and Hall effect in semiconductors
For semiconductors, as for metals, there will be potential differences on the contacts with different temperatures, and an electrical current will occur between these…
Semiconductor materials classification
Semiconductor materials contain not only elements, but also chemical compounds. Semiconductors can be organic and non-organic, crystalline and amorphous, solids and liquids. Despite the…
Dielectric polarization and it’s kinds
Polarization is a dielectric state when every unit of a dielectric volume has its electrical moment. There are two types of polarisation - occurring…