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Relevance. Rating Newest Oldest. Best Answer: In a generator, residual magnetism, also known as 'remanence' or remanent flux, is due to the hysteresis of the magnetic material in the core. When the current is removed, the magnetic flux often remains at some non-zero value. This is a characteristic phenomenon of ferromagnetic materials.
What are Temporary Magnets. Temporary magnets can be also magnetized by placing them inside an external magnetic field. The materialâs magnetism lasts so long as the external magnetic field is switched on, and disappears when the external magnetic field disappears.