问答详情-An aluminum wire has a resistance of .11 ohms. If you draw this wire through a die, making it thinner and?

问答详情-An aluminum wire has a resistance of .11 ohms. If you draw this wire through a die, making it thinner and?

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An aluminum wire has a resistance of .11 ohms. If you draw this wire through a die, making it thinner and?

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twice as long, what will be its new resistance?

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0861788249

0861788249 2017-01-14 09:22:50

to be twice as long with the same volume, the cross sectional area would have to be half that of the original wire. Halving the area doubles the resistance per unit length, and you now have twice the length, so the resistance doubles again, so the new resistance is 0.44
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