25. The surface charge density of an infinitely extended vertical plane is 4 ∙ 10−5 C / m2. A ball of the same name with a mass of 1 g and a charge of 1 nC is suspended from a plane on a thread. What angle with the plane forms the thread on which the ball hangs?
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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