46
3.4.2 The technical and the real current direction
In which direction do the electrons flow within an electric circuit?
Information about technical and real current direction:
Observing the flow of the electrons (f. ex. with the electrolysis), one can
see that the electrons really flow from the negative pole to the positive
pole. This is named the
“
physical current direction
”
in contrary to the
“
technical current direction
”
, where is defined, that the electric current
flows from the positive pole to the negative one. The technical current di-
rection is always used in circuit diagrams (f. ex.: with LEDs, diodes and
the generator).
Fig.3.25: Diagram of the principle of the technical current direction (in a
closed electric circuit) from the positive pole to the negative pole
The diode works like a valve, which allows the current to flow in one
direction and stops it in the other direction.
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