Field lines in a TOKAMAK are crucial for understanding plasma behavior, as they change significantly when the plasma is heated and current is introduced. Visual representations can be found through various online resources, including a gallery from Oak Ridge National Laboratory. Searching in English may yield more relevant results compared to other languages. The dynamics of field lines are complex, often leading to instabilities within the plasma, which poses challenges for magnetic confinement. Understanding these concepts is essential for advancements in fusion power technology.