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The Varley loop test is used to find the position of an earth fault on a line of length 40 km. The resistance/km of a

The Varley loop test is used to find the position of an earth fault on a line of length 40 km. The
resistance/km of a single line is 28 Ω. The fixed resistors have resistances of 250 Ω each. The fault is
calculated to be 7 km from the test end. To what value of resistance was the variable resistor set

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