Solution to task 339 from Chertov´s for extramural stud

Solution to task 339 from Chertov´s for extramural stud

339. The electric field is formed by an infinitely long filament charged with a linear density τ = 20 pC / m. Determine the potential difference U of two points of the field spaced from the thread at a distance of r1 = 8 cm and r2 = 12 cm.

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