What is a common symptom of a poor electrical connection?

Frequent circuit breaker trips are a common symptom of a poor electrical connection because when connections are loose or corroded, they can create an increase in electrical resistance. This resistance causes excessive heat to build up, leading the circuit breaker to trip as a safety measure to prevent overheating and potential fire hazards. The main function of a circuit breaker is to protect the electrical system from overloads, and when a poor connection creates irregularities in current flow, the breaker will frequently disconnect the circuit to mitigate risks.

The other options do not indicate issues with electrical connections. Bright, constant illumination and consistent power flow suggest that the electrical connections are functioning well. Warm electrical outlets might be a sign of various issues, but they do not directly point to poor connections as clearly as frequent circuit breaker trips do.