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An experiment is conducted to determine the resistance of an unknown resistor using a meter bridge. The known resistance R_1 is 10\ \Omega, and the length of the bridge wire is L=100\ cm. When the jockey is slid along the bridge wire, the balance point is found at a distance x=40\ cm from the end connected to the known resistance. Calculate the resistance of the unknown resistor.

Option: 1

25\ \Omega


Option: 2

15\ \Omega


Option: 3

35\ \Omega


Option: 4

45\ \Omega


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