Question
Asked Sep 25, 2019
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Calculate the ratio of the resistance of 12.0 m of aluminum wire 2.1 mm in diameter, to 30.0 m of copper wire 1.8 mm in diameter. The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is 2.65×10−8Ω⋅m.

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Expert Answer

Step 1

The resistance of copper is,

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pl (L.68x10*)(30) (L.8x10 /2) 0.198 ohm

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Step 2

The resistance of a...

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А (2.65x10*)(12) *(2лх10"2) %3D 0.0918 оhm

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