- Homework Statement
- In the circuit shown, determine Vx and the power absorbed by the 12 ohm resistor.
- Relevant Equations
- We used Ohm's law and current division.
First we found Vx by making and Req which equals to 6ohm (the circuit will like like a branch with as shown in the second circuit) we find the current in the 4ohm resistor branch using current division.
And to find the power absorbed in 12 ohm resistor we need to find the value of current that passes through that branch (i4), using current dividor as shown in the third circuit. What I don't get is why did we put an Req to find i1, we had only two resistor branches involved, so why couldn't it have worked if we used Req with the 1ohm, but it worked to find the current in other branches (after making an Req for each wire(?)?
Edit: turns out we can't put two pictures or idk, anyway, we found an Req first, so the circuit would look like, the current with ameber branch, the two parallel resistor branches (2ohm and Req=4ohm) and we used that to find Vx.
Then we go back to the original circuit, we make Req=6ohm (using the branch with 4ohm, 3 ohm, 6ohm, resistors). If that helps imagining how it looks.