What is it called when magnetism is produced by the flow of an electric current?

What is it called when magnetism is produced by the flow of an electric current?

• A. Magnetic Induction
• B. Ferromagnetism
• C. Electromagnetism
• D. Electrostatics

Answer: (C)

When charges move, they create a magnetic field around them. This link between electricity and magnetism is the realm of electromagnetism. A steady current in a conductor produces a magnetic field encircling the wire (imagine the right-hand rule: thumb in the direction of the current, fingers show the field). That direct cause-and-effect—current flowing and generating magnetism—is the hallmark of electromagnetism. Other terms don’t describe this general connection: electrostatics deals with stationary charges, ferromagnetism is about how certain materials have permanent magnetic order, and magnetic induction (in common usage) refers to inducing currents or fields via changing magnetic flux, not the basic current-to-magnetism relationship.

When charges move, they create a magnetic field around them. This link between electricity and magnetism is the realm of electromagnetism. A steady current in a conductor produces a magnetic field encircling the wire (imagine the right-hand rule: thumb in the direction of the current, fingers show the field). That direct cause-and-effect—current flowing and generating magnetism—is the hallmark of electromagnetism.

Other terms don’t describe this general connection: electrostatics deals with stationary charges, ferromagnetism is about how certain materials have permanent magnetic order, and magnetic induction (in common usage) refers to inducing currents or fields via changing magnetic flux, not the basic current-to-magnetism relationship.