Are there any equations in identifying the magnetic flux density of a ferromagnetic magnet at a certain distance (for example, a neodymium magnet has a magnetic flux density of 5.31 miliTesla at
![electromagnetism - Calculation of magnetic field saturation inside coil core - Electrical Engineering Stack Exchange electromagnetism - Calculation of magnetic field saturation inside coil core - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/QOFzw.jpg)
electromagnetism - Calculation of magnetic field saturation inside coil core - Electrical Engineering Stack Exchange
![Calculate magnetic flux density of the magnetic field at the centre of a circular coil of 50 tunrs, having radius of 0.5 m and carrying a current of 5 A. Calculate magnetic flux density of the magnetic field at the centre of a circular coil of 50 tunrs, having radius of 0.5 m and carrying a current of 5 A.](https://i.ytimg.com/vi/9OnWFZe53c4/mqdefault.jpg)