Question

When asked how to create an electromagnet, the best answer would be, "You can create an electromagnet by

applying a direct current to a non–magnetic material in order to create an electromagnetic field."

covering a wire with insulation and applying a direct electrical current to the magnet."

coiling a ferromagnetic material, wrapping in an insulator, and applying a current to the coil."

wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current."