Find the equivalent resistance seen by the source

scanferr
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Homework Statement



Find:

a) the equivalent resistor seen by the source;
b) value of i0;
c) value of v;
d) value of v0.

http://img823.imageshack.us/img823/4406/dasso.jpg


Homework Equations



Kirchoff's laws and Ohm's laws

The Attempt at a Solution



To solve b,c,d I need to get a right which I didn't. I got 6Ω for the equivalent resistor and the right answer is 8Ω. I don't understand why!
Isn't the circuit made of those 36Ω and 44Ω in series and the 40Ω,10Ω,30Ω in series and the parallel of those with the rest? I don't get why I got it wrong.

Can you people help me?
 
Last edited by a moderator:
scanferr said:

Homework Statement



Find:

a) the equivalent resistor seen by the source;
b) value of i0;
c) value of v;
d) value of v0.

http://img823.imageshack.us/img823/4406/dasso.jpg

Homework Equations



Kirchoff's laws and Ohm's laws

The Attempt at a Solution



To solve b,c,d I need to get a right which I didn't. I got 6Ω for the equivalent resistor and the right answer is 8Ω. I don't understand why!
Isn't the circuit made of those 36Ω and 44Ω in series and the 40Ω,10Ω,30Ω in series and the parallel of those with the rest? I don't get why I got it wrong.

Can you people help me?
Hello scanferr. Welcome to PF !

[STRIKE]I also get 8Ω for the equivalent resistance.[/STRIKE]

Show how you got your answer.

Added in Edit:

Actually, I also get 6Ω .

I don't know why I initially wrote 8Ω .
 
Last edited by a moderator:
I got 6 ohm as my answer !
 
6 ohms here, too. How can we all be using the same buggy calculator? :wink:
 
I get 6 ohms too. 8 ohms is just wrong. It happens.

Anyway, you would then calculate the voltage between the top and bottom supply rails and calculate the currents through the parallel resistors and networks.

V = I * R. I = 8 amps. R = 6 ohms.
 
Thanks guys!

It seems the solution is wrong then. It happens yes, and I was kinda confused because I didn't know how 8ohms could be right!
 

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