Question

how is an electromagnetic field produced?

A when a conductor interacts with a magnet
B when a current runs through a conductor
C when an object has an electrical charge
D when particles are arranged around a conductor

Answer 1

An electromagnetic field is produced primarily by the following:

**B** when a current runs through a conductor.

When an electric current flows through a conductor, it creates a magnetic field around it. This phenomenon is described by Ampère's law, which states that the magnetic field in space around an electric current is proportional to the electric current which serves as its source. Additionally, an electric field is generated whenever an electric charge is present (option C), but the combination of electricity and magnetism specifically leads to the creation of an electromagnetic field, especially as described by Faraday's law of electromagnetic induction when relating to changing magnetic fields.

So, while options B and C both relate to electromagnetic fields, option B is the most direct answer regarding the production of electromagnetic fields specifically through current flow in conductors.