# Circuits 1 ,hard proplem for me

1. Sep 14, 2004

### tinhnho

hi everyone

i try to solve this proplem but only have mesh 2 and 3, i stuck at mesh 1,please anyone give me some advise ? or ways to solve this proplem, thanks first.

Given :
Is1= .75A, Beta =1 A/A , rho = 3ohm
R1= 2 , R2 =2 , R3= 2, R4 =2, R5 =1, R6 =3
http://viethost4u.com/toan/circuit1.GIF [Broken]

Last edited by a moderator: May 1, 2017
2. Sep 15, 2004

### ehild

I cannot get to the site, attach the picture of the circuit to your post, please.

ehild

Last edited by a moderator: May 1, 2017
3. Sep 15, 2004

### tinhnho

i cant; attach,because this site say the image too large,i think it work now

4. Sep 15, 2004

### ehild

For mesh1, you have

i1=is2=beta*iy, and iy=i2-i3 (at R5). So the equation for mesh1 is:

i1-beta*i2+beta*i3=0.

Show me please what you got for mesh 2 and 3.

ehild

Last edited by a moderator: May 1, 2017
5. Sep 15, 2004

### tinhnho

Here what i did:
For mesh 2:
(i2-i1)*R4 + (i2-is1)*R2 + (i2-i3)*R5 =0
which i1,i2,is1,R2,R4,R5 are given

For mesh 3:
R6*i3 +(i3-i2)*R5 + vs3 = 0
we have vs3 = 3ix
but ix =-is1 -i2 ( KCL)

Put them together and solve ==> i1,i2,i3

thanks for repond