Answer:
A circuit breaker is a type of switch used to regulate electrical circuits. Option (a) is true.
Step-by-step explanation:
A circuit breaker is a type of switch used in electrical systems to regulate and control the flow of electrical current in a circuit.
Its primary function is to interrupt or break the flow of electricity in a circuit under abnormal conditions, such as an overload or a short circuit.
Step-by-step explanation:
Switching Function: A circuit breaker operates as a switch that can be manually or automatically controlled to open or close a circuit.
When the circuit breaker is in the closed position, it allows the normal flow of current.
When a fault occurs, such as an excessive current or a short circuit, the circuit breaker quickly opens, interrupting the current flow to prevent damage to the circuit or connected devices.
Protection: Circuit breakers serve as crucial protective devices in electrical systems.
They protect against overcurrents that could lead to overheating and fires. By interrupting the circuit in the event of a fault, circuit breakers help maintain the safety and integrity of the electrical system.
Resettable: Unlike fuses, which need to be replaced after they operate, circuit breakers are typically resettable.
After detecting and interrupting a fault, a circuit breaker can be manually or automatically reset, restoring the circuit to normal operation.
Switchgear: Circuit breakers are often part of larger switchgear assemblies used in power distribution systems.
They provide a means to isolate and control sections of the electrical network.
Thus, Option (a ) is true.