Which of the following statements correctly describes what happens when an electric current flows through a metal conductor?
Protons move through the wire.
Free electrons flow along the wire.
Positive ions move along the wire.
Free electrons vibrate in fixed positions.
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.