AP Physics B help - Electromagnetism

AI Thread Summary
The discussion revolves around solving a 2002 AP Physics B problem involving two lightbulbs rated at 30 W and 40 W, connected in both parallel and series circuits to a 120 V source. Key calculations include determining the resistance and current for each bulb in both configurations, as well as assessing their brightness based on power dissipation. Participants are encouraged to share relevant equations and methods to approach the problem, emphasizing that brightness correlates directly with power. The overall goal is to clarify the concepts of resistance, current, and power in electrical circuits. Assistance is sought to navigate the complexities of the assignment effectively.
fuschiso
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Hi, I've been working on a review assignment for a while, and I"m very good at electricity, so this question has me stumped.

Specifically, the 2002 AP Physics B, #3.

Two lightbulbs, one rated 30 W at 120 V and another rated 40 W at 120 V, are arranged in two different circuits.
(a) The two bulbs are first connected in parallel to a 120 V source.
i. Determine the resistance of the bulb rated 30 W and the current in it when it is connected to this circuit.
ii. Determine "..." 40 W and "..."
(b) The bulbs are now connected in series with each other and a 120 V source.
i. Determine the resistance of the bulb rated 30 W and the current in it when it is connected to this circuit.
ii. Determine ".." rated 40 W and "..."
(c)In the spaces below, number the bulbs in each situation described, in order of their brightness.
(d) Calculate the total power dissipated by the two bulbs in each of the following cases.
i. Parallel
ii. Series

If anyone could help, I'd really appreciate it!
 
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What have you got so far? Any ideas on what relevant equations to use?
 
"Brightness" is directly related to power
 

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