The correct answer is: A. current carrying contacts called electrodes.
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by excess current. It does this by interrupting the flow of current when the current exceeds a predetermined level. Circuit breakers are typically used in homes and businesses to protect electrical wiring and appliances from damage.
A circuit breaker consists of two main parts: a pair of current carrying contacts called electrodes, and an arc extinguisher. The electrodes are connected to the electrical circuit, and the arc extinguisher is designed to extinguish any arc that may form when the current is interrupted.
When the current in a circuit exceeds the predetermined level, the circuit breaker will open the contacts, interrupting the flow of current. This will cause an arc to form between the contacts. The arc extinguisher will then extinguish the arc, preventing it from damaging the circuit breaker or the electrical wiring.
Circuit breakers are an important safety device that can help to prevent electrical fires and other damage. They are typically installed in electrical panels, and they are usually easy to identify by their red or yellow color.
Here is a brief explanation of each option:
- Option B: Arc extinguishers are a component of circuit breakers that are designed to extinguish any arc that may form when the current is interrupted.
- Option C: Circuits to break the system is a general description of what circuit breakers do. They are designed to interrupt the flow of current in a circuit when the current exceeds a predetermined level.
- Option D: Transformers to isolate the two systems is not a correct description of what circuit breakers do. Transformers are used to transfer electrical energy from one circuit to another, and they do not have any role in isolating two systems.
- Option E: Any of the above is not a correct answer, as only option A is a correct description of what circuit breakers are.