A student rubs a polythene rod with a duster.
The rod becomes negatively charged.
What has happened to the rod?
It has gained electrons.
It has gained protons.
It has lost electrons.
It has lost protons.
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.