Justin loves to make electromagnets in his spare time. He wanted to teach his friend Jimmy about what the iron core of an electromagnet does. What is the best explanation?
A) It is a conductor that allows more current to flow through the electromagnet.
B) It produces a magnetic field that adds to the overall magnetic field of the electromagnet.
C) It is an insulator that protects people from getting shocked.
D) It produces a current that passes through the coil.
A simple electromagnet consisting of a coil of 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.
