MDCAT Physics MCQ #647

A researcher uses a circuit breaker to protect a circuit from overcurrent. What is the primary mechanism of action of a circuit breaker?

MDCAT Physics MCQ #647

  1. Question 1

    Q1. A researcher uses a circuit breaker to protect a circuit from overcurrent. What is the primary mechanism of action of a circuit breaker?

    • A) Heat dissipation from the circuit breaker
    • B) Electrical insulation of the circuit breaker
    • C) Automatic disconnection of the circuit
    • D) Manual disconnection of the circuit

    Answer: Automatic disconnection of the circuit

    Explanation: A circuit breaker automatically disconnects the circuit in case of overcurrent, while the other options are not its primary mechanism of action.