Ohm

Uned safonol (SI) i fesur gwrthiant trydanol ydy'r Ohm (symbol: Ω).

Ohm
Ohm
Enghraifft o:System Ryngwladol o Unedau gydag enw arbennig, uned ddeilliadol UCUM, uned ddeilliadol SI, uned wrthiant trydanol, uned rwystriant, unit of reactance, unit of modulus of impedance Edit this on Wikidata
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Defnyddir multimeter i fesur gwrthiant trydanol a hynny mewn ohms.

Uned safonol (SI) i fesur gwrthiant trydanol ydy'r Ohm (symbol: Ω).

Caiff ei ddiffinio fel y gwrthiant rhwng dwy ran o ddargludydd pan fo gwahaniaeth potensial sefydlog o 1 folt, sy'n cael ei roi i'r ddau le, yn cynhyrchu yn y dargludydd cerrynt o 1 amp.[1]

Yr enw

Mae'r uned wedi'i henwi er anrhydedd y ffisegydd o'r Almaen Georg Simon Ohm (1789–1854) a wnaeth ymchwil a ddatgelodd briodweddau sylfaenol trydan.

Cyfeiriadau

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