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Electrical Conductance and Electrical Resistance
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Electromagnetism
> Electrical Conductance and Electrical Resistance
Electrical Conductance and Electrical Resistance
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The electrical resistance in a conductor is given by:
Corresponding units:
ohm(Ω) = meter(m)/(siemens per metre (S/m) · square meter(m
2
))
The conductance is the reciprocal of resistance, thus:
G
= 1/
R
=
σ
·
S
/
l
Corresponding units:
siemens(S) = 1/ohm(Ω)
R
: resistance
G
: conductance
σ
: conductivity
S
: the crosssection area of the conductor
V
: voltage
I
: current
l
: the length of the conductor
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