What is the purpose of using a circuit breaker?

The primary purpose of using a circuit breaker is to protect electrical circuits from overload. A circuit breaker acts as a safety device that automatically interrupts the electrical flow when it detects a fault condition, such as an overload or short circuit. By doing this, it helps prevent potential hazards like electrical fires, equipment damage, and safety risks to individuals.

In normal operating conditions, electricity flows freely through the circuit. However, if the current exceeds safe levels, the circuit breaker trips, breaking the circuit and stopping the electricity flow. This function is crucial in maintaining the integrity of electrical systems and ensuring safety in residential, commercial, and industrial settings.

The other options refer to processes that do not align with the fundamental role of a circuit breaker. For example, boosting current flow and increasing voltage are more in line with the functions of transformers or amplifiers, whereas converting AC to DC pertains to rectifiers. None of these processes involve the protective capabilities that a circuit breaker provides.