The magnetic field created by a current in an inductor is described by classical electromagnetic theory. According to Ampere's law, a current flowing through a conductor generates a magnetic field around it. This principle applies to inductors as well.
An inductor is a passive electrical component typically consisting of a coil of wire wound around a core. When an electric current passes through the coil, a magnetic field is generated around the inductor. The strength and direction of the magnetic field depend on factors such as the magnitude and direction of the current, the number of turns in the coil, and the geometry of the inductor.
Classical electromagnetism, as described by Maxwell's equations, adequately explains the behavior of the magnetic field generated by a current in an inductor. It does not involve quantum theory, which deals with phenomena at the atomic and subatomic level.
Quantum theory, on the other hand, is primarily concerned with the behavior of particles at the quantum level and describes phenomena such as particle-wave duality, quantization, and wavefunctions. While quantum theory is essential for understanding phenomena in the microscopic world, it is not directly relevant to the classical description of inductors and their magnetic fields.