Question
Find the cross-sectional area of copper wire at $20^{\circ} \mathrm{C}$ that is $55.4 \mathrm{m}$ long and has resistivity $\rho=1.79 \times 10^{-6} \Omega \mathrm{cm}$ and resistance $0.943 \Omega$
Step 1
We know that 1 meter is equal to 100 centimeters. So, we multiply the given length by 100 to get the length in centimeters. \[ L = 55.4 \, m \times 100 \, cm/m = 5540 \, cm \] Show more…
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