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%TCIDATA{<META NAME="Title" CONTENT="Reference/Physics/Ohm">}
%TCIDATA{Created=Mon Aug 19 14:52:24 1996}
%TCIDATA{LastRevised=Thu Feb 13 19:53:52 1997}
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\section{Ohm}

\begin{tabular}{l}
Symbol: $\unit{\UNICODE{0x3a9}}$ \\ 
The \hyperref{SI unit}{}{}{SIUnits.tex} of electric resistance
\end{tabular}

An ohm is defined as the resistance between two points on a conductor
through which a current of one ampere flows as a result of a potential
difference of one volt applied between the points, the conductor not being a
source of electromagnetic force. This unit replaced the \emph{international
ohm} ($\unit{\UNICODE{0x3a9}}_{\text{int}}$), defined as the resistance of a
column of mercury of mass 14.4521 grams, length 106.300 $\unit{cm}$ at 0 $%
\unit{\UNICODE{0x2103}}$, and uniform cross section.

1$\unit{\UNICODE{0x3a9}}_{\text{int}}$= 1.000 49 $\unit{\UNICODE{0x3a9}}$

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