In parallel endless plate carrying the charge, uniformly distributed over the area of \u200b\u200ba surface density of 20 nC / m ^ 2, it is a thin thread with a uniformly distributed along the length of a charge of 0.4 nC / m. To determine the force acting on the yarn length interval of 1 m.

Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.

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