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In the simple Wheatstone bridge circuit...

In the simple Wheatstone bridge circuit, where the length `AB` of bridge circuit wire is `1m` the resistance `X` and `Y` have value `5 Omega` and `2 Omega` respectively, When `X` is shuted by a length of a wire the balance point to found to be `0.625 m` from A. What is the resistance of the shunt ? If the shunt is `0.75 m` long end 0.25 mm in diameter, what is the respectivity of the material of the wire ?

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