Which circuit condition isolates only a single station?

• A. Open circuit
• B. Short circuit
• C. Ground fault
• D. Intermittent connection

Answer: (B)

In a multi-station sound-powered circuit, faults can affect how many stations lose connectivity. Isolating just one station means the fault is localized at that point rather than breaking the entire line or causing widespread disruption. A short circuit at a particular station creates a very low-impedance path right there, effectively preventing that station from properly participating in the circuit while leaving the rest of the line usable for the other stations. So that one station becomes isolated, but the others can still communicate. Open circuits cut off the downstream path for all stations beyond the break, ground faults generally disturb more than one station and can produce unwanted noise, and intermittent connections cause unstable, sporadic loss rather than a stable isolation of a single station.