Engineering Finding Current in a Delta Transformation Circuit

AI Thread Summary
The discussion revolves around solving a circuit problem to find the current through a 1-ohm resistor. The user successfully calculated the equivalent resistance and total current by transforming the circuit from a T-form to a delta-transformation. They seek clarification on how to relate the currents in the delta-form branches to those in the T-form. A suggestion was made to apply Kirchhoff's Current Law (KCL) for a more straightforward solution. The user reported a calculated current of 0.1904 A through the 1-ohm resistor and requested verification of this result.
danilo_rj
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Homework Statement


http://i634.photobucket.com/albums/uu67/danilorj/circuito.jpg
Above is the picture of the circuit I'm trying to solve. The problem asks to find the current over the resistor of 1 ohm.


Homework Equations





The Attempt at a Solution


Well, I found the equivalent resistence of the circuit and thus the total current. But to do this, I transformed the T-form of the circuit between the resistors 70,1 and 20 ohms in a delta-transformation. My doubt is when I know the current in each branch of the delta-form how am I suppose to find the current in each branch of the t-form? What is the relation of current between them?
 
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danilo_rj said:

Homework Statement


http://i634.photobucket.com/albums/uu67/danilorj/circuito.jpg
Above is the picture of the circuit I'm trying to solve. The problem asks to find the current over the resistor of 1 ohm.


Homework Equations





The Attempt at a Solution


Well, I found the equivalent resistence of the circuit and thus the total current. But to do this, I transformed the T-form of the circuit between the resistors 70,1 and 20 ohms in a delta-transformation. My doubt is when I know the current in each branch of the delta-form how am I suppose to find the current in each branch of the t-form? What is the relation of current between them?


Welcome to the PF, danilo. Wouldn't it be easier to just solve the circuit using Kirchoff's Current Law (KCL) equations? That would be my first approach.
 
Last edited by a moderator:
That's a nice idea, I haven't thought that. Well, I found the current over the resistor of 1 ohm as being I = 0.1904 A. I would appreciate If you could check this answer for me.
 

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