Question
(a) What are the ratios of the resistances of (a) silver and (b) aluminum wire to the resistance of copper wire $\left(R_{\mathrm{Ag}} / R_{\mathrm{Cu}} \text { and } R_{\mathrm{A}} / R_{\mathrm{Ca}}\right)$ for wires of the same length and the same diameter? (c) Which material is the best conductor, for wires of equal length and diameter?
Step 1
We know that the resistance of a wire is given by the formula $R = \rho \frac{L}{A}$, where $\rho$ is the resistivity, $L$ is the length of the wire, and $A$ is the cross-sectional area of the wire. Show more…
Show all steps
Your feedback will help us improve your experience
Mederic Rodriguez and 87 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
(a) What are the ratios of the resistances of (a) silver and (b) aluminum wire to the resistance of copper wire $\left(R_{\mathrm{Ag}} / R_{\mathrm{Cu}}\right.$ and $\left.R_{\mathrm{Al}} / R_{\mathrm{Cu}}\right)$ for wires of the same length and the same diameter? (c) Which material is the best conductor, for wires of equal length and diameter?
What are the ratios of the resistances of (a) silver and (b) aluminum wire to the resistance of copper wire $\left(R_{\mathrm{Ag}} / R_{\mathrm{Cu}}\right.$ and $\left.R_{\mathrm{Al}} / R_{\mathrm{Cu}}\right)$ for wires of the same length and the same mass (not the same diameter)? (c) Which material is the best conductor, for wires of equal length and equal mass? The densities are: silver $10.1 \times 10^{3} \mathrm{kg} / \mathrm{m}^{3} ;$ copper $8.9 \times 10^{3} \mathrm{kg} / \mathrm{m}^{3} ;$ aluminum $2.7 \times 10^{3} \mathrm{kg} / \mathrm{m}^{3}$.
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD