Which statement about electric current and charge carriers in a metal conductor is correct?
In a d.c. circuit, the net flow of free electrons is in a single direction.
In a d.c. circuit, the electric current is consumed as it flows through a resistor.
In an a.c. circuit, free electrons are physically transferred from one end of the circuit to the other.
In an a.c. circuit, the magnitude of the electric current is always constant.
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.