A student investigates how the current in a miniature heating element changes with the potential difference across it.
The student uses their experimental results to calculate the resistance of the heating element.
The results are shown in Table 1.
| Potential difference (V) | Current (A) | Resistance (Ω\OmegaΩ) |
|---|---|---|
| 2.0 | 0.15 | 13 |
| 4.0 | 0.26 | 15 |
| 6.0 | 0.35 | 17 |
| 8.0 | 0.42 | |
| 10.0 | 0.48 | 21 |
| 12.0 | 0.52 | 23 |
Calculate the value of resistance that is missing from Table 1.