Which statement best describes the advantage of a circuit breaker over a glass plug fuse?

• A. It can be reset after an interruption
• B. It is cheaper to replace
• C. It interrupts faster
• D. It never trips for overloads

Answer: (A)

The main idea is that a circuit breaker provides reusable protection. When current runs too high, the breaker trips and opens the circuit. After the fault is cleared, you can reset the breaker to restore power without replacing any parts. That resettable feature is what makes a breaker advantageous over a glass plug fuse, which opens the circuit by melting a metal link and must be replaced each time it blows. While fuses can be inexpensive and fast, the downtime and part replacement required after each fault are drawbacks. Breakers are designed to trip on overloads, and they’re made to be reset, not permanently opened like a fuse.