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[" The resistivity of iron is "1times10^...

[" The resistivity of iron is "1times10^(-7)" ohm "-m" .The "],[" resistance of a iron wire of particular length and "],[" Q."5" thickness is "1" ohm.If the length and the diameter "],[" of wire both are doubled,then the resistivity in "],[" ohm "-m" will be "]

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