AP Physics C: E&M
8.6 Gauss’s Law
8.4 Electric Fields of Charge Distributions
A student measures the electric field magnitude \(E\) at several radial distances \(r\) from the midpoint of a uniformly charged thin rod of unknown length. The table displays the experimental data collected in a region close to the rod.
To test whether the data confirm the theoretical model for an infinitely long line of charge, which graph should the student plot, and which feature of that graph provides this confirmation?
| Distance \(r\text{ (m)}\) | Electric Field \(E\text{ (N/C)}\) |
|---|---|
| 0.05 | 7200 |
| 0.10 | 3600 |
| 0.20 | 1800 |
| 0.40 | 900 |
To test whether the data confirm the theoretical model for an infinitely long line of charge, which graph should the student plot, and which feature of that graph provides this confirmation?
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