Simple Circuits: Calculating Power in a Complex Circuit

[zaddyzad]

Homework Statement

http://imgur.com/PJVmXEc

Calculate the power delivered to (or dissipated by) R1

Homework Equations

V=IR
P=I^2R

The Attempt at a Solution

I attempted to calculate the equivalence resistance by doing... 2+(2^-1+4^-1+4^-1)^-1 = and I get 3.

I later calculate a current of 36.67Amps, and a power of 2688 watts. What did I do wrong.

then I tr

 

[zaddyzad]

I also tried... 60-2I2-4I2=0, 60-2I1-4I3=0, 110 -2I4-2I1=0

 

[SammyS]

Homework Statement

http://imgur.com/PJVmXEc

Calculate the power delivered to (or dissipated by) R1

Homework Equations

V=IR
P=I^2R

The Attempt at a Solution

I attempted to calculate the equivalence resistance by doing... 2+(2^-1+4^-1+4^-1)^-1 = and I get 3.

I later calculate a current of 36.67Amps, and a power of 2688 watts. What did I do wrong.

then I tr

(Posting the image makes it more likely that someone will reply to your question.)


This cannot be analyzed as a parallel/series circuit. That sort of method can only be used to replace R₂ & R₃ by considering them to be in parallel (for this circuit.)

Use Kirchhoff's Laws for the complete analysis.