
What are the types of electric currents? Explain with diagram
Basically there are 3 types of electric currents: Steady Current, Varying Current and alternating Current. Let us understand their concepts with complete graphical representation.
Right from the basic concepts of voltage and current, laws of electricity, concepts of semiconductors, basic components like resistors, capacitors, inductors, batteries, operational amplifiers, CRO, transducers, communication electronics, logic gates, flip-flops, etc.
Basically there are 3 types of electric currents: Steady Current, Varying Current and alternating Current. Let us understand their concepts with complete graphical representation.
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At temperatures above absolute zero, some electrons are excited out over the band gap into the conduction band. When the electron in pure silicon crosses the gap, it creates a vacancy, known as a hole, in the regular silicon lattice. A hole means actually nothing. But since it can accept an electron to get occupied into it, it is assumed to have a positive charge.
The average value of a waveform, which swings symmetrically above and below zero, will be obviously zero, when measured over a long period of time. Hence, average values of currents and voltages are invariably taken over one complete half-cycle (either positive or negative) rather than over one complete full-cycle (which would result in an average value of zero).
Transistor is a semiconductor device having three layers, three terminals and two junctions. Since we have only two types of semiconductors i.e. the p-type and n-type, there are two types of transistors: they are NPN transistor and PNP transistor.