Задача 00151.

At a distance r1= 20 cm from an infinitely long charged thread there is a point charge q= 7*10^-10 C. Under the action of the field, the charge moves up to a distance r2 = 40 cm. In this case, the work A = 5.0 * 10^-6 J is performed by the field forces. Find the linear charge density of the thread.

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