Which law describes the strong magnetic field produced by heavy electric current passing through a conductor?

The law that describes the strong magnetic field produced by heavy electric current passing through a conductor is Faraday's Law. This principle states that a changing magnetic field within a closed loop induces an electromotive force (EMF) in that loop, which is foundational to electromagnetism. When a heavy electric current flows through a conductor, it generates a magnetic field around the conductor, an effect described by Faraday's Law, highlighting the relationship between electricity and magnetism.

Faraday's Law is particularly relevant in understanding how electrical energy can be converted into magnetic energy and vice versa. The stronger the electric current, the stronger the magnetic field produced, which is critical in various applications, such as electric motors and transformers.

While other laws mentioned relate to electricity and magnetism, they do not specifically address the relationship between electric current and the resulting magnetic field in the same way that Faraday’s Law does. For example, Ohm's Law deals with the relationship between voltage, current, and resistance, Newton's Third Law pertains to action and reaction forces, and Maxwell's Equations encompass a broader framework of the relationships between electric fields and magnetic fields, but do not pinpoint the direct effect of electric current alone on magnetic field generation as Faraday’s Law does.