67. The charge 1 ∙ 10-9 Cl transferred from infin

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67. The charge 1 ∙ 10-9 Cl transferred from infinity to a point located at a distance of 1 cm from the surface of the charged sphere of radius 9 cm. The surface charge density of the ball 1 ∙ 10-4 C / m2. Identify committed while working. What work is done in the last 10 cm path?
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)