Which law explains the induction of electromotive force due to changes in a magnetic field?

The induction of electromotive force (EMF) due to changes in a magnetic field is described specifically by Faraday's Law of Electromagnetic Induction. This law states that a change in the magnetic environment of a coil of wire will induce an electromotive force in the wire. The induced EMF is proportional to the rate of change of the magnetic flux through the coil.

This principle is fundamental in understanding how electric generators function, where mechanical energy is converted to electrical energy through motion within a magnetic field. Faraday's Law forms the basis for many electromagnetic devices, including transformers and inductors, emphasizing its significance in both theoretical and practical applications of electromagnetism.

Other laws mentioned, such as Ohm's Law, deal specifically with the relationship between voltage, current, and resistance in electrical circuits, while Kirchhoff's Laws focus on the conservation of charge and energy in electrical networks. Newton's Laws pertain to motion and forces in classical mechanics and are not related to electromotive force or magnetic fields. Thus, Faraday's Law is the correct answer as it directly addresses the phenomenon of electromagnetic induction.