A student rubs a plastic ruler with a woollen cloth. The plastic ruler then repels a negatively charged balloon.
Which row is correct?
| State of the plastic ruler | What happened when the ruler was rubbed | |
|---|---|---|
| A | Negatively charged | It gained some electrons |
| B | Negatively charged | It lost some protons |
| C | Positively charged | It lost some electrons |
| D | Positively charged | It gained some protons |
Row A
Row B
Row C
Row D
145 exam-style questions on CIE IGCSE Physics 4.2.1a Positive and negative charge. Each one has a worked solution and a mark scheme showing where the marks go.