Which of the following can indicate an overloaded circuit?

An overloaded circuit occurs when there are too many devices drawing current from a power source beyond its capacity. This leads to overheating, which can trigger protective devices like fuses or circuit breakers to open the circuit in order to prevent damage or fire hazards. Frequent fuse blowouts or circuit breaker trips indicate that the electrical demand is exceeding the safe load, which is a clear sign of an overload situation.

In contrast, bright lights may be a result of a momentary high voltage surge but do not necessarily indicate an overload. Steady current flow without fluctuations suggests a stable circuit, which does not imply overloading. Similarly, consistent voltage readings generally indicate that the circuit is functioning within normal parameters and is not under stress from an overcurrent situation. Thus, the presence of repeated fuse blowouts or trips is the most accurate and direct indicator of an overloaded circuit.