In electronics, the coil used only when it comes to the treatment of an alternating current.
For DC voltages, the coil just as an Ohm resistance often of copper that can be.
Between the 0.1 and 10 K Ohm.
In general, the resistance value no greater than 50 Ohm.
For alternating voltage the so-called alternating current resistance increases with the frequency of the alternating voltage was adopted.
We go there later still deeper.
Often, an iron core has a coil, such as the iron core of the transformer or a ferrite core.
Ferrite comprises iron powder that is pressed together with a binder.
A coil with 10 turns behaves after a ferrite core is arranged as if they have a lot more turns by means of the iron core or ferrite core is so enlarged as it were, the number of turns.
Since it can be, in most cases, the ferrite core into or out of the coil body can be rotated so inductance different winding numbers, or values.
The more windings the greater the inductance, the greater the iron core, the greater the inductance.
The use of the coil in the practice of alternating voltages in a circuit to block.
Voltages in a circuit by To close.
Equal voltage short by measuring the discharge current of a coil.
Times together with a capacitor to form.
One resonant circuit with resistance to build.
Circuits for certain frequencies for rectification disturbing AC voltages to filter away.
To make a coupling between amplifier stages 2.
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