A magnetic field is characterised by the energy parameter. If we turn the switch S to position 2 (Figure 33), the current in the…
Category: Year 1
Magnetic field in the matter
Let’s consider magnets. Magnets are substances that create the magnetic field around them, without currents through the magnets. However, there are micro-currents that operate…
Matter magnetisation
Let’s consider the solenoid that creates a magnetic field when DC current goes through the coil. The field in the solenoid is uniform, and…
Magnetic types
Depending on the value of magnetic permittivity, magnetic substances are divided by the diamagnetics, paramagnetics and ferromagnetics. The first two classes are weak magnetics.…
Maxwell’s magnetic theory
Still a question that has to be answered is why conductivity electrons are moving in the magnetic field in the conducting circuit. (Figure 37).…
Shift current and Maxwell equations
Variable magnetic fields create a vortex electric field in the conductor, which leads to the electric current appearance in the conductor. Let’s consider two…
Enhancement MOSFETs
FET transistors are working differently than BJT transistors. In FET width of conducting channel is varied by applying of external electric field. They operate…
Depletion MOSFET
A depletion MOSFET is a one state transistor, that is in an ON state even when the gate to source voltage VGS or VGSS…
Single-phase circuits. Sine-wave signals.
Sine-wave signals In this post we will learn about AC circuits, magnetic circuits and transient processes in these systems, and other aspects of complex…
Classification of electric materials
Materials in electronics can be classified as electrotechnical, constructional and special. Electrotechnical materials are classified by four groups: Conductors Semiconductors Isolators Magnetic materials. Electrotechnical…