Linked from
The 10 pages that link to Ohm, each with the reason it gives.
SI derived unitBroader topic: It links potential difference and current in electrical measurements.
ResistorRelated: Resistor values are specified in this unit.
VoltCompared with: Resistance is a ratio of voltage to current, not voltage itself.
Georg OhmBroader topic: The resistance unit bears Ohm’s name in recognition of his work.
HenryCompared with: Resistance and inductive reactance both oppose current, but use different units.
Joule's first lawRelated: Resistance R is measured in ohms in the equation.