ohm, Ω (unit)

This page documents an OPTIMADE Unit Definition. See https://schemas.optimade.org/ for more information.

ID: https://schemas.optimade.org/defs/v1.2/units/si/1960/named/ohm
Definition name: ohm

Unit name: ohm
Latin symbol: ohm
Display symbol: Ω

Description: A derived SI unit for electrical resistance equal to kg·m²·s⁻³·A⁻² in the 1960 SI base units.

"The ohm is the electrical resistance that exists between two points of a conductor when a constant potential difference of one volt, applied between these two points, produces a current of one ampere in the conductor, provided that the conductor is not the seat of any electromotive force." [9th CGPM meeting in 1946]

Resources:

Formats: [JSON] [MD]

JSON definition:

{
    "$id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/named/ohm",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
    "title": "ohm",
    "symbol": "ohm",
    "display-symbol": "\u03a9",
    "description": "A derived SI unit for electrical resistance equal to kg\u00b7m\u00b2\u00b7s\u207b\u00b3\u00b7A\u207b\u00b2 in the 1960 SI base units.\n\n\"The ohm is the electrical resistance that exists between two points of a conductor when a constant potential difference of one volt, applied between these two points, produces a current of one ampere in the conductor, provided that the conductor is not the seat of any electromotive force.\" [9th CGPM meeting in 1946]",
    "resources": [
        {
            "relation": "Definition at the 9th CGPM meeting (1948)",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/9-1948"
        },
        {
            "relation": "Definition and establishment of the SI unit system at the 11th CGPM meeting (1960), resolution 12.",
            "resource-id": "https://www.bipm.org/en/committees/cg/cgpm/11-1960/resolution-12"
        },
        {
            "relation": "Wikipedia article describing the unit",
            "resource-id": "https://en.wikipedia.org/wiki/Ohm"
        }
    ],
    "defining-relation": {
        "base-units": [
            {
                "symbol": "A",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/ampere"
            },
            {
                "symbol": "kg",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/kilogram"
            },
            {
                "symbol": "m",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/metre"
            },
            {
                "symbol": "s",
                "id": "https://schemas.optimade.org/defs/v1.2/units/si/1960/base/second"
            }
        ],
        "base-units-expression": "A^-2*kg*m^2*s^-3"
    },
    "standard": {
        "name": "si",
        "year": 1960,
        "category": "named",
        "symbol": "ohm"
    },
    "x-optimade-definition": {
        "label": "ohm_si_1960_named",
        "kind": "unit",
        "format": "1.2",
        "version": "1.2.0",
        "name": "ohm"
    }
}