A metal wire of circular cross-section h...

A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes `R_(2)`, then `R_(2) : R_(1)` is

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A metal wire of circular cross-section has a resistance `R_(1)`. The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes `R_(2)`, then `R_(2) : R_(1)` is

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