Задача 30390.

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

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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