Resistivity
Resistivity definition
- Resistivity is how resistant a material is and how well current can go through it.
- It is the opposite of conductivity.
- When you double the length, the resistivity doubles because it has twice as much distance to get through.
- When you double the area, the resistivity halves because it is twice as easy to get through (imagine a road going from one lane to two lanes.)
| L/m | v/v | R/ohm |
|---|---|---|
| 0.1 | 0.17 | 1.13 |
| 0.2 | 0.30 | 2.00 |
| 0.3 | 0.43 | 2.87 |
| 0.4 | 0.52 | 3.47 |
| 0.5 | 0.64 | 4.27 |
| 0.6 | 0.77 | 5.13 |
| 0.7 | 0.92 | 6.13 |
| 0.8 | 1.07 | 7.13 |
| 0.9 | 1.17 | 7.8 |
| 1.0 | 1.25 | 8.33 |
I/A = 0.15
| A/m^2 | I/A | v/v | R/ohm |
|---|---|---|---|
| 0.06 | 0.15 | 1.25 | 9.33 |
| 0.12 | 0.27 | 0.17 | 4.33 |
| 0.18 | 0.42 | 1.08 | 2.57 |
| 0.24 | 0.53 | 0.99 | 1.87 |
| 0.30 | 0.58 | 0.12 | 1.93 |