| A | B |
|---|
| Attractive force | Proton interacting with electron |
| Force is nine times greater | Distance between charges decreases by a factor of 3 |
| Force is four time greater | Both charges double in value |
| Force is one fourth as large | Distance between charges doubles |
| Electrons | Negatively charged particles |
| Protons | Positively charged particles |
| Electric field | Units are Newtons per coulomb |
| One volt | 1 joule per coulomb |
