Two small insulated spheres, X X\,X and YYY, repel each other when they are suspended close to one another.
Which row in the table explains why?
| Sphere XXX | Sphere YYY | |
|---|---|---|
| A | Equal numbers of protons and electrons | More protons than electrons |
| B | More protons than electrons | More protons than electrons |
| C | More electrons than protons | More protons than electrons |
| D | Equal numbers of protons and electrons | Equal numbers of protons and electrons |
Row A
Row B
Row C
Row D
15 exam-style questions on OCR GCSE Physics Static and charge. Each one has a worked solution and a mark scheme showing where the marks go.