A neutral rubber sheet is rubbed with a neutral nylon cloth. Immediately after rubbing, a coulombmeter is used to measure the charge on each object.
| Object | Charge / nC |
|---|---|
| Rubber sheet | -4.8 |
| Nylon cloth | +4.8 |
Explain what happened to electrons during the rubbing. Use the readings to support your answer.
The charged rubber sheet is held close to a small, neutral polythene bead without touching it.
State what happens to the bead and explain why.
91 exam-style questions on Edexcel GCSE Physics 11.1 Charging by friction, covering 11.1.1 Charging insulators by friction, 11.1.2 Forces between charges, 11.1.3 Electrostatic phenomena, and 11.1.4 Earthing and removing charge. Each one has a worked solution and a mark scheme showing where the marks go.