Question
7. Conducting Wire A conducting wire has a $1.0 \mathrm{~mm}$ diameter, a $2.0 \mathrm{~m}$ length, and a $50 \mathrm{~m} \Omega$ resistance. What is the resistivity of the material?
Step 1
The radius is half of the diameter, so we have: \[ r = \frac{d}{2} = \frac{1.0 \, \text{mm}}{2} = 0.5 \, \text{mm} \] We also need to convert this to meters, so we have: \[ r = 0.5 \times 10^{-3} \, \text{m} \] Show more…
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