Question

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

Answer 1

The correct answer is D. wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

Explanation

An electromagnet is a non permanent magnet that is created with an electric current .When current flows through a wire it induces  a magnetic field around the wire. When the wire is wrapped around in a coil, the magnetic field that is induced is concentrated in the center of the coil, creating a north and south pole.   The field is that of a solenoid.  

Electromagnets are usually made by wrapping insulated coil of wire around a ferromagnetic metal. This focuses the electromagnetic field and creates a magnet as long as there is current running trough the insulated wire.

The correct answer is D. wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

Answer 2

Choice-D will do the job nicely.