I = σEA where:I is the current flowing in the conductor (in amperes)
σ is the conductivity of the material (in siemens per meter)
E is the electric field strength (in volts per meter)
A is the cross-sectional area of the conductor (in square meters)
This equation is known as Ohm’s law, which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points.
Here is a list of different materials and their conductivity:
Silver: 63 x 10^6 S/m
Copper: 59 x 10^6 S/m
Gold: 45 x 10^6 S/m
Aluminum: 37 x 10^6 S/m
Calcium: 29 x 10^6 S/m
Tungsten: 18 x 10^6 S/m
Nickel: 14 x 10^6 S/m
Brass: 15 x 10^6 S/m
Iron: 11 x 10^6 S/m
Platinum: 9.4 x 10^6 S/m
Zinc: 16.7 x 10^6 S/m
Tin: 9.2 x 10^6 S/m
Lead: 4.8 x 10^6 S/m
Comments