Mesh analysis with dependent sources

Click For Summary
The discussion focuses on using mesh analysis to determine three currents in a circuit, with the provided answers being I1 = -1.25A, I2 = 0.125A, and I3 = 1.125A. A participant expresses confusion about the calculation of voltage Va, questioning the formula Va = (I2-I3)/5. Another participant clarifies that voltage should be calculated as resistance multiplied by current, not the other way around. The original poster acknowledges the error in their understanding. This highlights the importance of correctly applying Ohm's law in mesh analysis.
Cocoleia
Messages
293
Reaction score
4

Homework Statement



I need to use mesh analysis to find the three currents:
upload_2016-12-17_15-22-11.png

Homework Equations

The Attempt at a Solution


upload_2016-12-17_15-20-54.png

The answers are I1= -1.25A, I2=0.125A and I3 = 1.125A
I don't know where I messed up for I3
 
Physics news on Phys.org
Cocoleia said:

Homework Statement



I need to use mesh analysis to find the three currents:
View attachment 110493

Homework Equations

The Attempt at a Solution


View attachment 110491
The answers are I1= -1.25A, I2=0.125A and I3 = 1.125A
I don't know where I messed up for I3
How di you get Va = (I2-I3)/5 ?
 
nrqed said:
How di you get Va = (I2-I3)/5 ?
It should be multiplied
 
Cocoleia said:
from the 5Ω resistance
My point is that a voltage is a resistance times a current, it cannot be a current divided by a resistance
 
nrqed said:
My point is that a voltage is a resistance times a current, it cannot be a current divided by a resistance
Thank you I didn't realize my error
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Solving a circuit using both the mesh and node analysis
  • · Replies 3 ·
Replies
3
Views
2K
Solving Current & Power in 4 & 3 Wire Circuits
  • · Replies 9 ·
Replies
9
Views
2K
Network Analysis, Kirchhoff's Laws, changing current source to voltage
  • · Replies 4 ·
Replies
4
Views
1K
Mesh Analysis Method for Finding Current in a Circuit with Dependent Source
  • · Replies 5 ·
Replies
5
Views
2K
What's Wrong with My Thevenin Equivalent Short-Circuit Current Calculation?
  • · Replies 1 ·
Replies
1
Views
1K
Norton equivalen circuit problem
  • · Replies 8 ·
Replies
8
Views
2K
Multiple Power Source Circuit Analysis
  • · Replies 9 ·
Replies
9
Views
3K
Engineering Computing the Maximum Power delivered to a Resistor
  • · Replies 7 ·
Replies
7
Views
2K
Two batteries and two resistors circuit - wrong possible answers ?
  • · Replies 16 ·
Replies
16
Views
2K
Finding the currents in this circuit (2 voltage sources and 3 resistors)
  • · Replies 10 ·
Replies
10
Views
3K