AP Physics 2
11.3 Resistance, Resistivity, and Ohm’s Law
Four solid cylindrical conducting rods are fabricated from different materials with various dimensions, as specified in the table.
Which of the following correctly ranks the electrical resistances \(R_1\), \(R_2\), \(R_3\), and \(R_4\) of the four conductors?
| Conductor | Resistivity | Length | Diameter |
|---|---|---|---|
| 1 | \(\rho_0\) | \(L_0\) | \(d_0\) |
| 2 | \(2\rho_0\) | \(2L_0\) | \(2d_0\) |
| 3 | \(\rho_0\) | \(2L_0\) | \(d_0\) |
| 4 | \(2\rho_0\) | \(L_0\) | \(2d_0\) |
Which of the following correctly ranks the electrical resistances \(R_1\), \(R_2\), \(R_3\), and \(R_4\) of the four conductors?
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