A moving-coil permanent-magnet instrument can be used as flux-meter by
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A moving-coil permanent-magnet instrument can be used as flux-meter by eliminating the control springs.
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Faraday's Principle of Electromagnetic Induction states that the emf induced in a loop due by a changing magnetic flux is equal to the rate of change of the magnetic flux threading the loop. The magnetic flux threading a coil of wire can be changed by moving a bar magnet in and out of the coil.
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