A polythene rod is rubbed with a dry cloth. The rod becomes negatively charged.
Why has the rod become negatively charged?
It has gained protons.
It has gained electrons.
It has lost protons.
It has lost electrons.
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.