Definition of ohm in English:


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(also Ω)
  • The SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt.

    ‘Both antennas feature linear polarization, an impedance of 50 ohms and maximum input power at 10 watts.’
    • ‘It is important for the termination to be precisely 50 ohms for the bridge to function properly on 50-ohm communication systems.’
    • ‘If you use a resistor less than 100 ohms you'll know it because it will get hot.’
    • ‘The correct way to split T3 cables is to use what's called a power splitter, which contains a transformer to balance the impedance properly at 75 ohms on all connections.’
    • ‘Resistance of electrodes was held below 10K ohms.’



/ōm/ /oʊm/


Mid 19th century named after G. S. Ohm (see Ohm, Georg Simon).