What happens to the brightness of bulbs in a series circuit as more bulbs are added?

In a series circuit, the brightness of bulbs decreases as more bulbs are added because the current flowing through each bulb increases. When bulbs are connected in series, the total resistance of the circuit increases as more bulbs are added. As a result, the total current decreases and the voltage across each bulb increases.

However, this effect is overshadowed by the diminishing current, leading to an overall decrease in the perceived brightness of the bulbs as more are added to the series circuit. Understanding these principles is fundamental to comprehending the behavior of series circuits and the impact of resistance on current and voltage distribution.