What does Lenz's Law state about induced electromotive force (emf)?

Lenz's Law is a fundamental principle in electromagnetism that describes the behavior of induced electromotive force (emf) in response to a change in magnetic flux. According to Lenz's Law, when a change in magnetic flux occurs, the induced emf generates a current that creates its own magnetic field. This induced magnetic field opposes the change that caused it, aligning with the principle of conservation of energy.

The key to understanding Lenz's Law lies in its emphasis on opposition. When the flux through a circuit increases, the induced current flows in such a way that its magnetic field counteracts the increase, serving to resist the change. Conversely, if the magnetic flux decreases, the induced current flows to try to maintain the flux, again opposing the change. This opposition is crucial for ensuring that energy is conserved and does not create energy from nothing.

In summary, the assertion that Lenz's Law states the induced current always gives rise to a magnetic field that opposes the original change encapsulates the essence of this law. It highlights the inherent characteristics of electromagnetic induction and the relationship between magnetic fields and induced currents.