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Circuts and Light Bulbs

1. Homework Statement
Two Light bulbs, one rated 30W at 120V and another rated 40W at 120V are arranged in two different circuits.
a) they bulbs are connected in parallel to a 120V source

determine the resistance and current in both bulbs.

b) determine the resistance and current if they are connected in series


2. Homework Equations
P=IV

V=IR


3. The Attempt at a Solution

I took the power over the voltage to find the current and then plugged that in to V=IR, but how does the voltage and current differ when it splits, or when it is in series?
 

Answers and Replies

256
0
The load voltages for a parallel configuration is the same across each load. Each light in the parallel configuration has the same voltage.

For a series configuration the load voltages add to equal the source voltage.
 

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