In this paper, an analysis of electromagnetic ion cyclotron waves in the magnetosphere of Jupiter at 17 Rj has been done based on observations made by Ulysses. By examining the observations made by the Ulysses spacecraft, we aim to shed light on the intricate mechanisms of wave-particle interactions and their influence on the magnetosphere. Our focus lies specifically on the phenomenon of ring distribution, where the magnetosphere is fully ionized and resonant interactions occur. We investigate the detailed dispersion relation between the electromagnetic ion cyclotron waves and the parallel propagation of the waves along the magnetic field lines. This allows us to gain a comprehensive understanding of the presence of AC electric fields in the collision-less magnetosphere of Jupiter at a distance of 17 Rj. Through rigorous analysis and calculations, we aim to elucidate the intricate dynamics that govern the behavior of electromagnetic ion cyclotron waves in this unique environment. By considering the ring distribution and the resonant interaction between the waves and the fully ionized magnetosphere, we can unravel the complexities of this fascinating phenomenon. Our findings hold great significance in expanding our knowledge of Jupiter’s magnetosphere and its radio emissions. Understanding the behavior of electromagnetic ion cyclotron waves and their interaction with the AC electric fields is crucial for comprehending the broader dynamics of this celestial body. We hope that this analytical study will contribute to the ongoing research efforts in the field of planetary magnetospheres and inspire further investigations into the intricate interplay between electromagnetic ion cyclotron waves and the magnetosphere of Jupiter.