Question
:You've got a $1.5$-m length of a wire that has diameter $0.51 \mathrm{~mm}$ and is rated for a maximum current of $3.5 \mathrm{~A}$. Find (a) the resistance of the wire and (b) the voltage from one end to the other when it's carrying its maximum rated current.
Step 1
The radius is half of the diameter, so we have: \[ r = \frac{d}{2} = \frac{0.51 \, \text{mm}}{2} = 0.255 \, \text{mm} = 2.55 \times 10^{-4} \, \text{m} \] Show more…
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