Statement of a problem № 41722


The air between two parallel plates separated by a distance d = 20 mm is ionized by X-ray radiation. Each plate has an area S = 500 cm2. Find the concentration of positive ions if at a voltage V = 100 V a current I = 3.0μA flows between the plates, which is well below the saturation current. The air ion mobilities are u0 + = 37 cm2/(V ∙ s) and u0 = 1.91 cm2/ (V ∙ s).

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