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


Homework Equations


P=IV

V=IR


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

  • #2
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.
 

Related Threads on Circuts and Light Bulbs

  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
5
Views
6K
Replies
8
Views
4K
Replies
1
Views
2K
Replies
1
Views
1K
Replies
2
Views
8K
Replies
5
Views
2K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
0
Views
15K
  • Last Post
Replies
1
Views
2K
Top