The following data shows the conductivity of 5 metals and the rate of change in gravitational potential energy due to induced current when the metal is passed through a electromagnetic field of 5.4mT on the end of a pendulum. you know, the classic eddy current experiment.(adsbygoogle = window.adsbygoogle || []).push({});

I'm just wondering if anyone knew an equation linking the conductivity and rate of energy disipation??? It looks like an exponential relationship to me. Anyone know exactly what it is? Would be realy helpful! cheers

Material Rate of change in Gravitational conductivity

potential energy(10^-4J/s) (10^6 siemens/m)

Steel 3.53 1.5

Nickel silver 3.62 3.5

Zinc 3.71 17

Aluminium 4.47 35

Copper 8.46 58

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electromagnetic damping and conductivity of metals

**Physics Forums | Science Articles, Homework Help, Discussion**