Why is open circuit characteristics called magnetic characteristic?

Open circuit characteristics are referred to as magnetic characteristics because they illustrate how a magnetic circuit behaves when no current flows through the coil, highlighting the relationship between magnetomotive force (MMF) and magnetic flux. This relationship is crucial for understanding the performance of magnetic devices like Transformers and inductors. The curve typically shows how the magnetic flux varies with changes in MMF, providing insights into the core material's properties and saturation behavior. Hence, it emphasizes the magnetic properties of the system under open circuit conditions.