In electric motor, why electromagnets are preferred over pemanent magnets ?
Asked by | 7th Mar, 2008, 10:32: PM
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be rapidly manipulated over a wide range by controlling the amount of electric current. However, a continuous supply of electrical energy is required to maintain the field.
Answered by | 8th Dec, 2017, 02:50: PM
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