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CBSE Class 10 Answered

In electric motor, why electromagnets are preferred over pemanent magnets ?
Asked by | 07 Mar, 2008, 10:32: PM
Expert Answer

An electromagnet is a type of magnet in which the magnetic field is produced by the flow of an electric current. The magnetic field disappears when the current ceases.

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.

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