An electric appliance is connected to the mains supply via a plug containing a fuse. During operation, the fuse melts and breaks the circuit.
What is the direct cause of the fuse wire melting?
The temperature of the room rises too high.
The appliance is switched off at the mains socket.
The current flowing through the circuit is too large.
The voltage of the mains supply drops to safety limits.
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.