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1- what is an electromagnet
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a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
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the term electromagnet is defined as the production of a magnetic field by current flowing in a conductor. In 1820,Danish scientists Hans oersted discovered that a magnetic compass would be deflected from it's resting position as a wire carrying electric current were placed near the compass. The magnetic field will be concentrated in the core. This arrangement is called solenoid
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