A student rubs a perspex rod with a dry cloth. The rod becomes positively charged.
The student says that rubbing the rod has made new positive charge on the rod.
Explain why the student is wrong.
The student now rubs a metal rod with the same cloth while holding the metal rod in their bare hand. The metal rod does not become charged.
Suggest why the metal rod does not become charged.
40 exam-style questions on AQA GCSE Physics 2.5 Static electricity, covering 2.5.1 Static charge and 2.5.2 Electric fields. Each one has a worked solution and a mark scheme showing where the marks go.