• Support PF! Buy your school textbooks, materials and every day products Here!

Kirchoff's Rules

  • Thread starter fsm
  • Start date
  • #1
fsm
88
0

Homework Statement


This is the circuit I'm working on:
cir.gif


Homework Equations


My equations are:
4.64v=-200I1-800I3
4.64v=750I3+800I2
4.64v=-200I1-750I3


The Attempt at a Solution


I should have a third unknown in each equation. I not seeing where I'm going wrong. I'm supposed to put this in a 3X3 matrix and have Excel solve for the simultaneous equations. Any help?
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,258
618
There are three different loops that you can sum the voltages around in the problem. The one involving R2 and R3 does not include the battery. So the sum around that loop should be zero. Your first equation also has an 800I3. Typo?
 

Related Threads on Kirchoff's Rules

  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
1
Views
968
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
13
Views
2K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
8
Views
23K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
2
Views
914
  • Last Post
Replies
6
Views
970
Top