A polythene rod is rubbed with a dry woollen cloth. The rod becomes negatively charged. Why has the rod become negatively charged?
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.