Which statement describes how a fuse operates in an electrical circuit?
It only allows current to flow in one direction.
When the current becomes too high, it melts and breaks the circuit.
Its resistance decreases as the temperature of the surroundings increases.
It uses a low-current circuit to switch on a circuit carrying a much larger current.
135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.