Some clothes are dried in a tumble dryer. The clothes rub against each other as the drum turns.
When the clothes are taken out, a nylon shirt and a wool jumper stick together.
Explain how the clothes become charged.
The nylon shirt is positively charged.
State the charge on the wool jumper. Explain why the shirt and the jumper stick together.
Two nylon socks from the same load are held close together by their tops, without touching.
Describe and explain what happens to the socks.
A student says:
'The tumble dryer has made positive charge on the nylon shirt.'
Explain why the student is wrong.
43 exam-style questions on OCR GCSE Physics 3.1 Static and charge, covering 3.1.1 Positive and negative charge, 3.1.2 Static electricity and forces between charged objects, 3.1.3 Electron transfer and static electricity, 3.1.4 Electric fields, 3.1.5 Current as a flow of charge, 3.1.6 Current in a single closed loop, and 3.1.7 Charge, current and time. Each one has a worked solution and a mark scheme showing where the marks go.