The equation for calculating current flowing in a conductor from an electric field

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