Question
What is the resistance of a 20.0-m-long piece of 12-gauge copper wire having a 2.053-mm diameter?
Step 1
The radius is half the diameter, so we have: \[ r = \frac{d}{2} = \frac{2.053 \, \text{mm}}{2} = 1.0265 \, \text{mm} \] But we need the radius in meters, so we convert mm to m: \[ r = 1.0265 \times 10^{-3} \, \text{m} \] Show more…
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What is the resistance of a 20.0 -m-long piece of 12-gauge copper wire having a 2.053 -mm diameter?
What is the resistance of a 20.0 -m-long piece of 12 -gauge copper wire having a 2.053 -mm diameter?
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