(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

(See attachment for diagram)

Known Values:

R1 = 5

R2 = 15

R3 = 25

R4 = 5

V1 = 40

V2 = 20

I1 = 71/7

I2 = 25/7

I3 = 4

1) Find the power dissipated in each resistor

2) Find the power associated with each voltage source including the independent

source and specify whether it is delivered or dissipated.

3) Verify that the total delivered power equal the total dissipated power

2. Relevant equations

P=RI^{2}

P=VI

3. The attempt at a solution

Power Dissipated:

(In the resistors)

P=RI2

R1*(I1- I3)^{2}= 5(71/7-4)^{2}= 188.7

R2*(I1- I2)^{2}=15(71/7-25/7)^{2}= 647.8

R3*(I3- I2)^{2}=25(4-25/7)^{2}= 4.59

R4*(I3)^{2}=5(4)^{2}= 80

(By the voltage source in the middle of the branch)

P=VI

(25I2)(I2)=(25*25/7)(25/7)=318.8

Total Power Dissipated:1239.9

Power Supplied:

V1= 40(I1) = 405.7

V2= 20(I2) = 71.4

25I2* I1=905.6

Total Power Supplied: 1382.7

What am I doing wrong here in calculating the power supplied/absorbed?

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# Homework Help: Power dissipated and supplied (Circuit Diagram)

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