Fuses and circuit breakers are both safety devices used to protect electrical circuits from excessive currents.
Which statement correctly describes how these two devices operate?
A fuse contains a wire that melts to break the circuit when the current is too high, whereas a circuit breaker is an electromagnetic switch that trips to break the circuit.
A fuse is an electromagnetic switch that trips to break the circuit when the current is too high, whereas a circuit breaker contains a wire that melts.
Both fuses and circuit breakers use the heating effect of current to melt a component and permanently disconnect the circuit.
Both fuses and circuit breakers use electromagnets to break the circuit and can be easily reset without replacing any parts.
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.