# Voltage, Current and Resistance – 16

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16. A circuit breaker is a ________.

(a) fuse
(b) switch
(c) resettable protective device
(d) resistor

Explanation
Explanation :

Circuit breaker break the circuit when it sense any abnormal condition in the circuit using relay. Relay is a very important component in a circuit breaker.
Circuit breaker is a switch. Relay is a resettable protective device.

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