Which statement correctly describes the movement of charge carriers when there is an electric current flowing in a metal wire?
Positive ions drift along the wire from the positive terminal to the negative terminal.
Electrons vibrate about fixed positions but do not travel along the wire.
Free electrons drift through the metallic lattice from the negative terminal towards the positive terminal.
Protons move along the wire from the negative terminal to the positive terminal.
51 exam-style questions on CIE IGCSE Physics 4.2.2a Electric current, charge and measuring current. Each one has a worked solution and a mark scheme showing where the marks go.