[Initial growth processes in seeds in magnetic fields, strengthened or weakened in relation to the geomagnetic field]

Izvestiia Akademii Nauk. Seriia Biologicheskaia
|March 19, 2010
PubMed

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An emf is induced when the magnetic field in a coil is changed by pushing a bar magnet into or out of the coil. emfs of opposite signs are produced by motion in opposite directions, and the directions of emfs are also reversed by reversing poles. The same results are produced if the coil is moved rather than the magnet—it is the relative motion that is important. The faster the motion, the greater the emf. Additionally, there is no emf when the magnet is stationary relative to the coil.
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