Ohm's Law:
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
V=IR
Joule-Lenz law:
The power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current.
Hall effect:
The production of a potential difference across an electrical conductor when a magnetic field is applied in a direction perpendicular to that of the flow of current.
Ampere's Law:
Ampere's Law specifically says that the magnetic field created by an electric current is proportional to the size of that electric current with a constant of proportionality equal to the permeability of free space.
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