The electrical energy from the pickup must come from the kinetic energy of the strings. Does this mean if the pickup is unconnected that it is absorbing less energy? Some must also be lost to hysteresis. If you do go through with the experiment I'd be interested in finding out if my hypothesis is correct although I imagine that for all practical purposes the effect is negligible.
As a side note, would pulling a magnet off the strings be a repeatable way to test this?
As a side note, would pulling a magnet off the strings be a repeatable way to test this?
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