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Physics, 28.07.2019 00:30 wazzuphottie1999

How would you make an electromagnet? (a) wrap insulation around a magnetic material, and create an electromagnetic field around the magnet. (b) cover a magnet with insulation, and apply an alternating electrical current to the magnet. (c) cover a twisted ferromagnetic material with insulation, and apply a direct current to the coil. (d) wrap an insulated wire around a metal with ferromagnetic properties, and apply an electric current.

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