conductance, resistance, conductivity

1. conductance, G

S : cross section area,
σ : conductivity,
l : length

2. resistance, R

3. condunctivity, σ
unit : S·m^-1  or mhos·m^-1

	Conductivity (S·m-1)	Temperature (°C)
Silver	6.301 × 107 6.17 × 107	20
Copper	59.6 × 106	20
Annealed Copper	5.8 × 107	20
Gold	4.52 × 107 4.17 × 107	20
Alnuminium	3.78 × 107 3.82 × 107	20
Seawater	3~5	23
Drinking water	0.0005 to 0.05
deionized water	5.5 × 10-6
Silicon	1.2 × 103
Iron	1.03 × 107
Bronze	1.00 × 107
Steel (silicon)	2.00 × 106

[conductivity table 출처 : wikipedia, rfdh.com]