Way for calculating the level of magnetisation of a gapped ferromagnetic core

The paper examines a way for calculating the necessary current for achieving certain level of magnetization of a gapped ferromagnetic core with a given frequency, supply voltage and airgap length. The magnetic flux density equation is precise only when the entire flux is confined to the core. The errors of the calculation will be small only if magnetic path is completely composed of very high permeability material. The addition of an air gap in our specific case leads to the necessity of finding a way for more accurate calculation. This algorithm could be used for certain practical designs and research projects when higher level of accuracy is needed. For this equation as for many others, there isn´t readily available information in the technical books and university materials showing when that equation is valid and when it isn´t. It is very important in education all kinds of laws and equations to be directly linked to practical examples clearly pointing the circumstances under which they are correct which will help students to achieve higher knowledge and understanding and will allow for faster and better project design process.