Fuses and circuit breakers are safety devices designed to protect electrical circuits from excess current.
Which statement correctly describes a difference in their operation?
A fuse contains a wire that melts and breaks the circuit when the current exceeds a certain level, whereas a circuit breaker uses an electromagnet or bimetallic strip to open a switch.
A circuit breaker contains a wire that melts and breaks the circuit when the current is too high, whereas a fuse uses an electromagnet to open a switch.
A fuse operates when the voltage in the circuit is too high, whereas a circuit breaker operates when the current is too high.
A circuit breaker must be replaced after it operates, whereas a fuse can simply be reset by flipping a switch.
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.