If lights were wired in parallel and one bulb burns out, the other bulb will

• A. Go out completely
• B. Remain lit with no change
• C. Stay lit with no change
• D. Dim but still lit

Answer: (B)

In a parallel setup, each bulb is connected directly across the same supply, giving each its own path from the power source. If one bulb burns out and its path opens, the other bulb still has the full supply voltage across it, so it stays lit with the same brightness. The failed branch stops drawing current, but the other branch remains unaffected. This is different from a series arrangement, where a failure would interrupt the current through everything in the loop.