Task id12997

To determine the location of the damage to the insulation of a two-wire telephone line with a length of L = 4 km, a battery with e.g. was connected to one end of it. d.s., E = 15 v. It turned out that if the wires at the other end of the line are open, the current through the battery I1 = 1 A, if they are short-circuited, then the current through the battery I2 = 1.8 A. Find the location of the damage and the insulation resistance R at the location of the damage. The resistance of each line wire is 5 ohms. Neglect battery resistance.