Which statement about electric current in a metallic conductor is correct?
In a direct current (d.c.) circuit, the net flow of free electrons is continuously in one direction.
In an alternating current (a.c.) circuit, the free electrons travel all the way from the power supply to the load in each cycle.
In a direct current (d.c.) circuit, the current gradually decreases in magnitude as it passes through successive components.
In an alternating current (a.c.) circuit, the free electrons drift in a single direction with a constantly increasing speed.
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.