Only if ur 100% in order to create an electromagnet, you would a. apply a charge to a non–magnetic material in order to create an electromagnetic field. b. coil a ferromagnetic material, wrap in an insulator, and apply a direct current to the coil. c. cover a wire with insulation and apply an alternating electrical current to the magnet. d. wrap an insulated wire around a metal with ferromagnetic properties and apply an electric current.

D. Wrap an insulated wire around a metal with ferromagnetic properties and apply an electric current.

The magnetic field is turned off when an induced current is not present.

Thus, an electromagnet would act as a magnet only when a current is induced in an insulated wire that is wrapped around a material of ferromagnetic material such as iron core rotating in a magnetic field.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.