Question
A $1.0$-cm-diameter rod carries a 50 -A current when the electric field in the rod is $1.4 \mathrm{~V} / \mathrm{m}$. What's the resistivity of the rod material?
Step 1
First, we need to find the cross-sectional area of the rod. Since the diameter is given, we can find the radius (r) by dividing the diameter by 2. So, r = 1.0 cm / 2 = 0.5 cm = 0.005 m. Show more…
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