A fuse is a safety device connected in series with the live wire of an electrical circuit. Which of the following best describes why a fuse is used?
To maintain a constant voltage across the appliance.
To protect the circuit from overheating and fire by melting if the current becomes too large.
To provide an alternative path for the current to flow safely into the ground.
To reduce the total electrical resistance of the appliance.
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.