Ohm
1. Ohm is the practical meter-kilogram-second unit of electric resistance equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere.
2. The ohm is the SI derived unit of electrical resistance, named after German physicist Georg Ohm.
It is equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere (1Ω = 1 V/A); or, the resistance in which one watt of power is dissipated when one ampere flows through it. Ohm’s law (q.v.) states that resistance equals the ratio of the potential difference to current, and the ohm, volt, and ampere are the respective fundamental units used universally for expressing quantities.
Impedance, the apparent resistance to an alternating current, and reactance, the part of impedance resulting from capacitance or inductance, are circuit characteristics that are measured in ohms. The acoustic ohm and the mechanical ohm are analogous units sometimes used in the study of acoustic and mechanical systems, respectively.
In a direct-current ( DC ) circuit, a component has a resistance of one ohm
when a potential difference of one volt produces a current of one ampere through the
component. In AC and RF circuits, resistive ohms behave the same as DC circuits,
provided the root-mean-square ( rms ) AC voltage is specified. In AC and RF
circuits, reactance exists only when there is a net capacitance or inductance.
Capacitive reactances have negative imaginary ohmic values; inductive reactances
have positive imaginary ohmic values. The reactance of a particular capacitor or
inductor depends on the frequency
Google’s English dictionary by Oxford Languages https://languages.oup.com/google-dictionary-en/
Словник Cambridge Dictionary https://dictionary.cambridge.org/ru/
John Welch, Encyclopedia of Physical Science and Technology (Third Edition), 2003
Ohm. Definition from TechTarget. Retrieved from: https://www.techtarget.com/whatis/definition/ohm
Definition of OHM. Merriam-Webster Online Dictionary. Retrieved from: https://www.merriam-webster.com/dictionary/ohm