Magnetic flux of ring with current. Ring inductance

In the literature in physics, devoted to the section “Electricity and magnetism”, various forms of conductors with currents that create a magnetic field are considered. One of them is the ring. A ring or a single-turn circuit is an element of many electrical devices. One of the main parameters of the ring is inductance. In this work, we first consider the magnetic flux created by a current-carrying ring. Then, based on a certain magnetic flux, the inductance of the ring is found. The resulting formula is in good agreement with the other expressions for the inductance of the ring.