| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| permittivity of free space value | 1.32 | 1 | 2307 | 85 | 32 |
| permittivity | 1.04 | 0.7 | 6313 | 51 | 12 |
| of | 0.59 | 0.1 | 4145 | 43 | 2 |
| free | 0.77 | 0.6 | 4860 | 72 | 4 |
| space | 1.29 | 0.8 | 8613 | 86 | 5 |
| value | 1.53 | 0.4 | 208 | 7 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| permittivity of free space value | 1.59 | 0.5 | 7082 | 68 |
| permittivity of free space value si units | 0.46 | 0.2 | 5726 | 76 |
| permittivity of free space value in air | 1.02 | 0.1 | 9971 | 1 |
| permittivity of free space constant value | 1.49 | 0.5 | 5155 | 94 |
| value of electric permittivity of free space | 0.78 | 0.8 | 9078 | 76 |
| permittivity of free space constant e0 value | 0.17 | 0.9 | 9365 | 15 |
| units of permittivity of free space | 1.72 | 0.8 | 8375 | 69 |
| value of permittivity of free space | 1.32 | 1 | 3842 | 97 |
