The Resistivity of Copper at 20ºC Is 1 $\times$ 10^-8 $\Omega$ · MYou Have Copper Wire Whose Diameter Is 2

question 16

Multiple Choice

The resistivity of copper at 20ºC is 1.7 $\times$ 10^-8 $\Omega$ · m.You have copper wire whose diameter is 2.00 mm and need a resistance of 1.00 $\Omega$ .How long would a piece of this wire need to be to provide this resistance?

• A)19.6 m
• B)49.1 m
• C)185 m
• D)317 m
• E)542 m

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