What is the primary function of a circuit breaker?
- ATo store electrical energy like a battery
- BTo protect the circuit from overcurrent and short circuits
- CTo convert AC power to DC power
- DTo balance loads across multiple phases
Correct Answer
To protect the circuit from overcurrent and short circuits
Explanation
A circuit breaker detects excessive current (from overloads or shorts) and interrupts the circuit automatically. It can be reset after the fault is cleared, unlike a fuse which must be replaced.