Final answer:
A moving electric charge or current generates a magnetic field surrounding it. This is a fundamental concept in Physics, particularly electromagnetism, and is described by Maxwell's equations.
Step-by-step explanation:
The subject of this question is electromagnetism, which falls within the field of Physics. When an electric charge is in motion, such as a current flowing through a wire, it does not only produce an electric field but also a magnetic field. This is seen when we observe the effects a magnetic field can have on surrounding materials and how it interacts with other magnetic fields or moving charges.
Static charges generate an electric field, whereas moving electric charges also produce magnetic fields. Essentially, whenever you have a moving charge, such as an electric current, there will inevitably be a magnetic field surrounding it. This phenomenon is fundamental to the operation of various devices, from electric motors to the Earth's own magnetic field generated by currents in its molten core.
Moving electric charges are known to create magnetic fields according to the laws of electromagnetism, particularly as outlined by Maxwell's equations. These equations describe how the movement of electric charges (current) produces a magnetic field, which can be interacted with or detected using magnetic materials or other instruments sensitive to magnetic forces.