Elektritakistusel
Elektritakistusel is a fundamental property of electrical conductors that describes their opposition to the flow of electric current. It is a measure of how difficult it is for electrons to move through a material. When an electric potential difference is applied across a conductor, electric current flows. This flow is not unimpeded; the atoms and electrons within the material collide with the moving electrons, causing them to lose energy and scatter. This phenomenon is what constitutes electrical resistance.
The unit of electrical resistance is the ohm, symbolized by the Greek letter omega (Ω). One ohm is
Several factors influence the electrical resistance of a material. The resistivity of the material itself is