Current, voltage, power

  • Thread starter -EquinoX-
  • Start date
  • #1
564
1

Homework Statement




http://img69.imageshack.us/img69/3523/42317761.jpg [Broken]
http://img194.imageshack.us/img194/7240/82479056.jpg [Broken]

Homework Equations





The Attempt at a Solution



The answer is 400w and 1ma respectively, but how do I get to it?
 
Last edited by a moderator:

Answers and Replies

  • #2
2,044
312
How much power does a current source deliver to a circuit? On what depends it?
Can you figure out what the potential of the various parts of the circuit is?

For part b:

1. introduce two unknown potentials for the two points where 3 resistances meet. The
potentials at the top and bottom of the circuit are +40 mv and 0.

2. compute the currents in all five resistors as a function of the 2 unknown potentials

3. use Kirchhofs current rule in the points with unknown potential from step 1 to set up 2 equations for the unknown potentials

4. solve the equations

5. compute any current needed for the answer
 
  • #3
564
1
for part a should I simplify the circuit? otherwise I am still lost on how to do it

and I am even more confused by your explanation in part b, which one are you referring when you say potential at top and bottom?
 

Related Threads on Current, voltage, power

  • Last Post
Replies
3
Views
7K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
3
Views
17K
Replies
4
Views
809
Replies
2
Views
4K
Replies
28
Views
5K
Replies
9
Views
2K
Replies
1
Views
6K
Replies
15
Views
13K
Replies
1
Views
3K
Top