Ffarad
Un o unedau deilliadol y System Ryngwladol o Unedau yw'r ffarad (symbol: F), a ddefnyddir i fesur cynhwysiant, sef gallu corff i ddal gwefr drydanol.[1]
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| Enghraifft o: | System Ryngwladol o Unedau gydag enw arbennig, uned ddeilliadol UCUM, uned gynhwysiant  |
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Un o unedau deilliadol y System Ryngwladol o Unedau yw'r ffarad (symbol: F), a ddefnyddir i fesur cynhwysiant, sef gallu corff i ddal gwefr drydanol.[1]
Mae gan gynhwysydd werth o 1 ffarad os yw'n gallu dal 1 coulomb (C) o wefr ar gyfer pob folt (V) o wahaniaeth potensial.
Yr hafaliad yw:
(Q= gwefr, C= cynhwysiant, V= gwahaniaeth potensial)
Yr enw
Mae'r uned wedi'i henwi er anrhydedd y cemegydd a ffisegydd o Loegr Michael Faraday (1791–1867) a wnaeth gyfraniadau pwysig ym meysydd electrocemeg ac electromagneteg.
Cyfeiriadau
- ↑ The International System of Units (SI) (Bureau International des Poids et Mesures, Awst 2025); adalwyd 24 Ebrill 2026
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