A wire of length 10 mathrm ~cm and radius sqrt 7 times 10 4 mathrm ~m is c....

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A wire of length 10 mathrm ~cm and radius sqrt 7 times 10 4 mathrm ~m is connected across the right gap of a meter bridge When mathrm a resistance of 4 5 Omega is connected on the left gap by using a resistance box the balance length is found to be at 60 mathrm ~cm from the left end If the resistivity of the wire is R times 10 7 Omega mathrm m then value of R is
1 463
B 35
C 66
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