- #1

doktorwho

- 181

- 6

## Homework Statement

In this problem we are asked to calculate the total power of the resistors in the circuit below.

## Homework Equations

##P=I^2R##

## The Attempt at a Solution

My solution goes like this:

PT=PR1+PR2+PR3+PR4+PR5

I can find PR1 and PR5 immediately from the given current generators:

PR1=IG1^2*R1

PR5=IG2^2*R5

Since i know those powers one i don't need the current generators and can transform the right and left sides to thevenin equivalents:

Clearly

ET1=-ET2

ET1=E1=24V and RT1=R1=12Ω (i hope i got this right)

Now we can see that we have this type of situation. I transformed the resistor 3 as in the picture and can divide the circuits into 2 and the powers of the resistors will the sum of two.

I will be solving the left one:

Re=R3R2/(R3+R2)=4Ω

I=ET1/(Re+R1) = 24/18 = 4/3 A

and the power of two element are P3'+P2=Re*(4/3)^2 and that times 2 is the total power.

Something is wrong here. The result should yield 312 W and i just don't get that. What is wrong?