Induction constant - the energy conversion gained from moving a magnetically charged object on a conductor type material like copper, silver, gold. I guess for every material has to be different. I searched around the net with no luck so I hope someone here might know what I‘m trying to explain.A percent (%) of energy gained or lost in the process. / Difference between the energy needed to run the process of electromagnetic induction and the energy gained from it.
The phenomenon you are talking about is called eddy currents. There is a current setup in the conducting material when there is a relative motion between the plate and the material. The magnitude will depend upon the motion (speed) itself as well as the conductivity of the material. Higher the conductivity large will be the current. This current is harder to even measure.
To add to anonymous answer, the eddy currents are a function of the SHAPE of the material as well as the material itself. So in a transformer the core is made of laminations of thin material to minimize those currents. Ferrite uses powdered magnetic material to keep each piece small and reduce the eddy currents that way. So in effect there is no constant that can be applied. The only thing you should be aware of is that the better the conductor the more that energy can be lost in these effects. The second effect is called hysteresis. It takes energy to create a field in a magnetic material. When you reduce that field again you don't get all the energy back. Some has been lost to friction in the material and is turned to heat. Again the losses are dependent on factors such as the frequency of operation. Not a simple constant.
There is no specific name for this. The % of energy converted to a useful form is simply the 'efficiency'. 100 minus this value is the energy 'wasted' (usually turned to heat). So if you search for information on the efficiency of a generator (dynamo) you might find some useful information.
