 role. Examples are charged particle beams, an electron cloud in a Penning trap, and positron plasmas.[18]Dusty plasma and grain plasma[සංස්කරණය]A dusty plasma is one containing tiny charged particles of dust (typically found in space) which also behaves like a plasma. A plasma containing larger particles is called a grain plasma.Mathematical descriptions[සංස්කරණය]The complex self-constricting magnetic field lines and current paths in a field-aligned Birkeland current which may develop in a plasma[19]මූලික ලිපිය: Plasma modelingTo completely describe the state of a plasma, we would need to write down all the particle locations and velocities, and describe the electromagnetic field in the plasma region.However, it is generally not practical or necessary to keep track of all the particles in a plasma.Therefore, plasma physicists commonly use less detailed descriptions known as models, of whichthere are two main types:ද්‍රව ආකාතිය[සංස්කරණය]Fluid models describe plasmas in t