Why does a light bulb in a series circuit dim when another bulb is added?
AThe total resistance decreases.
BThe total resistance increases, reducing current.
CThe voltage source weakens.
DNothing changes.
Explanation
📌 In series, resistances add. Adding a bulb increases R, so current decreases (I = V/R), and each bulb receives less current. Distractor A: opposite; C: source is not affected; D: change is real.