Question
In household wiring, copper wire with cross sectional area of $2.5 \mathrm{~mm}^{2}$ is often used. Find the resistance of a $24.0 \mathrm{~m}$ length of this wire.
Step 1
We do this by dividing by 1000 twice, as there are 1000 millimeters in a meter. This gives us: \[2.5 \mathrm{~mm}^{2} = 2.5 \times 10^{-6} \mathrm{~m}^{2}\] Show more…
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In household wiring, copper wire 2.05 mm in diameter is often used. Find the resistance of a 24.0-m length of this wire.
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In household wiring, copper wire 2.05 mm in diameter is often used. Find the resistance of a 24.0 m length of this wire.
In household wiring, copper wire 2.05 $\mathrm{mm}$ in diameter is often used. Find the resistance of a 24.0 -m length of this wire.
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