Ohm's law it came to bring to man the power to control electrical currents and use it for their own benefit, safely and with increasing power.
It was created by the German physicist Georg Simon Ohm in 1827, this law is the parameter to determine the electrical resistance of an electrical energy conductor.
Georg defined Ohm's law, being the definition of how the electrical resistance performs its work and also demonstrated that in the conductor, the electrical current is proportional to the applied power difference.
Index
The first Ohm's law defines that an ohmic conductor or constant resistance, kept at a constant temperature will leave the intensity of the electric current proportional to the potential difference (ddp) applied to its far end.
This shows that electrical resistance is always constant. It is represented by:
R = resistance which is measured in Ohm
U = electrical potential difference (dpp) measured in volts (v)
I = electric current intensity, measured in amperes (A)
The second ohm's law defines that electrical resistance is directly proportional to its length and inversely proportional to its cross-sectional area. And it also depends on the material being worked on.
This law is represented by:
R = resistance
p = conductor resistivity (depending on the material and its temperature)
L = length (m)
A = cross-sectional area (mm2)
Ohm's law research has been enhanced by the fact that
Electrical resistance shows the ability of a conductor to be opposite and resist the passage of electrical current. Resistance inhibits and hinders the passage of electrical current through the conductor.
Resistors are electronic devices that have the function of transforming electrical energy into thermal energy with the joule effect.
Ohmic or linear resistors obey the first lawof ohm (R=U/I). The intensity (i) of the electric current is proportional to its potential difference (ddp), popularly known as voltage.
Resistors that are not ohmic do not obey Ohm's law.
Georg's study of ohm's law was improved with a specific criterion: he used electrical wires of various sizes and thicknesses in his research.
We also recommend: Atomic models.
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