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The creation of a voltage by changing the magnetic flux such that the amount of voltage induced is directly proportional to the rate of change of the magnetic flux according to Faraday's or Neumann's law (see also lenz's law). In applied geophysics, induction is a fundamental process in electromagnetic (EM) prospecting; a primary EM field is used to induce a secondary field in any subsurface conductors and the resultant of the two fields is measured. The strength of the secondary field, which is a direct function of the electrical conductivity of the ground, can then be determined.

Subjects: Earth Sciences and Geography.

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