In a circuit pathway, an unwanted disconnection from the power source where no current can flow is called an ______.

In a circuit pathway, an unwanted disconnection from the power source where no current can flow is called an ______.

• A. Open
• B. Short
• C. Ground fault
• D. Arcing

Answer: (A)

An open circuit is a break in the circuit that prevents current from flowing. When the path is interrupted, there’s no complete route for electrons to travel, so the current drops to zero even if voltage is present. This fits the description of an unwanted disconnection from the power source. The idea can be tied to Ohm’s law: if the path is broken, the effective resistance becomes very high, causing I to be essentially zero. The other terms describe situations where current can still find a path—shorts create a low-resistance bypass, ground faults send current to earth, and arcing involves a spark across a gap—so they don’t match the scenario of no current flow due to a disconnected path.

An open circuit is a break in the circuit that prevents current from flowing. When the path is interrupted, there’s no complete route for electrons to travel, so the current drops to zero even if voltage is present. This fits the description of an unwanted disconnection from the power source. The idea can be tied to Ohm’s law: if the path is broken, the effective resistance becomes very high, causing I to be essentially zero. The other terms describe situations where current can still find a path—shorts create a low-resistance bypass, ground faults send current to earth, and arcing involves a spark across a gap—so they don’t match the scenario of no current flow due to a disconnected path.