An open circuit is best described as which condition?

• A. A completed path for current with no breaks.
• B. No current can flow because of a short.
• C. The circuit is fully energized.
• D. A broken wire interrupting the path.

Answer: (D)

An open circuit means the electrical path is not complete, so there is a break in the conductor that stops current from flowing. A broken wire interrupting the path captures this idea directly: the loop isn’t closed, so electrons can’t complete their circuit. The other descriptions describe different situations: a completed path with no breaks is a closed circuit where current can flow; a short creates a low-resistance bypass that causes current to flow in an unintended way, not an open condition; and a fully energized circuit implies current is flowing through a complete loop, which again isn’t the case in an open circuit.