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21 February, 19:45

Explain why an electromagnet usally has a core of iron or steel

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  1. 21 February, 22:40
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    A simple electromagnet consisting of a coil of insulated wire wrapped around an iron core. A core of ferromagnetic material like iron serves to increase the magnetic field created. The strength of magnetic field generated is proportional to the amount of current through the winding.
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