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Category «elektronika»



Diode is a two-terminal electronic component that has different electrical conductivity depending on the polarity of the applied voltage. Diodes can be vacuum (rectifiers), gas-filled (gas diodes, ignitrons, corona and glow discharge stabilizers), semiconductor, and so on. Currently, semiconductor diodes are used in the vast majority of cases, so we will focus on them. A …



A varistor is a semiconductor resistor with a symmetric non-linear volt-ampere characteristic. The name is derived from the words “variable resistor” – a resistor that changes. It has the property of sharply decreasing its resistance when the applied voltage exceeds a certain threshold value. With further increase in voltage, the resistance decreases even more. Principle …

Ohm’s Law

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Ohm’s Law This law takes into account the key quantitative characteristics of an electric circuit: Ohm’s Law А law stating that electric current is proportional to voltage and inversely proportional to resistance. To describe an electric circuit that does not contain EMF, you can use Ohm’s law for a section of the circuit. This is …



A semiconductor is a substance that occupies an intermediate position between conductors, which have high electrical conductivity (metals, electrolytes), and dielectrics, which conduct almost no electric current (porcelain, rubber, and others).