Which term describes metal contacts that open and close a circuit at times intervals?

• A. Armature
• B. Amplification
• C. Breaker points
• D. Bridge circuit

Answer: (C)

Breaker points are metal contacts that open and close the circuit at precise time intervals. This switching action is driven by a cam or timing mechanism, allowing current to build up in a winding and then abruptly change, which is how the timing and control of the circuit is achieved. The term specifically describes the pair of contacts that repeatedly make and break the connection, whereas the armature is a moving part in a magnetic device, amplification is about increasing signal strength, and a bridge circuit is a static network used for measurement—not a timed switching contact.