Voltage divider circuit Help required

  • Engineering
  • Thread starter Matt1234
  • Start date
  • #1
142
0

Homework Statement


Hello, can someone please help me create the following curcuit? Id like to know the steps so i can to solve this. I dont seem to be getting the correct answer its very frustrating because it seems so simple. please advise.

[PLAIN]http://img517.imageshack.us/img517/8919/54967623.jpg [Broken]

Homework Equations



KVL
KCL
Ohms Law


The Attempt at a Solution



Notice i keep getting a negative R2:
Please advise

[PLAIN]http://img404.imageshack.us/img404/5573/lastscanq.jpg [Broken]
 
Last edited by a moderator:

Answers and Replies

  • #2
142
0
After some more review, R1 must be 2 times greater then Req in order to get that drop arrcoss the load. Req being the equivalent resistance of R2 and 1000 ohms.

Now the current being close to 5ma is the next step.
 
Last edited:
  • #3
142
0
anyone please?
 
  • #4
gneill
Mentor
20,925
2,866
Suppose you were to replace the 15V supply and R1 and R2 with a Thevenin equivalent. Then you'd have a supply in series with a single resistor.

Now consider the output voltage with 0mA and 5mA loads. If you set them to your +/- 10% conditions, you should have two equations in two unknowns, they being R1 and R2...
 
Last edited:

Related Threads on Voltage divider circuit Help required

Replies
2
Views
1K
Replies
4
Views
1K
Replies
4
Views
1K
  • Last Post
Replies
11
Views
5K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
766
  • Last Post
Replies
3
Views
1K
Top