Resistors in a Circuit

  • Thread starter exitwound
  • Start date
  • #1
292
1

Homework Statement



Capture2.JPG


Homework Equations



Resistors in Series = R1 + R2 + R3... = Req
Resistors in Parallel = 1/R1 + 1/R2 + 1/R3 ... = 1/Req

The Attempt at a Solution



Studying for a test. This sample exam went pretty well. I am having trouble with 3 out of the 20. I can't figure this one out.

The bottom branch can be combined to be Req = 30 + 30 = 60 Ohms

From there, I can't seem to find a way to combine the rest. I have the answer (B) but I can't collapse the circuit.
 

Answers and Replies

  • #2
550
2
The top right resistor is shorted out, so it has no effect. Imagine that it's erased from the diagram.
The center point and point b are the same point.
You have 30 in parallel with 30 in parallel with (30+30).
1/[(1/30) + (1/30) + (1/{30+30})] = 12 ohms.
 
Last edited:

Related Threads on Resistors in a Circuit

  • Last Post
Replies
5
Views
4K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
4
Views
2K
Replies
12
Views
519
  • Last Post
Replies
3
Views
15K
  • Last Post
Replies
2
Views
3K
Replies
12
Views
3K
Replies
3
Views
2K
Replies
0
Views
1K
Replies
2
Views
22K
Top