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
What is the logic behind the rule of calculating the magnetic flux density in a magnetic field created by a circular coil, a solenoid and a straight wire? I can't understand them
![What is the Relationship between Magnetic Flux density and electric field intensity - Electrical Engineering Stack Exchange What is the Relationship between Magnetic Flux density and electric field intensity - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/9270T.jpg)
What is the Relationship between Magnetic Flux density and electric field intensity - Electrical Engineering Stack Exchange
![Sustainable energy related projects | Superconducting Magnetic Density Separation | Energy, Materials & Systems (EMS) Sustainable energy related projects | Superconducting Magnetic Density Separation | Energy, Materials & Systems (EMS)](https://www.utwente.nl/.uc/i4db9c0470102493f35001d6dcc01077837bd6aa4e7390701c42702cd0080/gopq0ge9fyqddnkm3cfcfq.png)