How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit

C. When the current is too high, a reset-able switch opens the circuit.    

Explanation:

The circuit breaker has an electromagnet that has a specific maximum magnetic force. When the current becomes too high the core is magnetized

and attracts a soft iron armature which automatically breaks the circuit. Once the problem has been fixed the circuit breaker is reset by a switch.

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