Mesh analysis and power dissipation

AI Thread Summary
In mesh analysis, the power dissipation in resistors must equal the power supplied by voltage sources. To solve for power dissipation, first determine the current in each branch and calculate the power for each resistor using the formula PR = I²R. Sum these power values to find the total power dissipated in the network. Additionally, calculate the power contribution from voltage sources with PS = Vs⋅I, ensuring to consider the orientation of the voltage source and the direction of current. Finally, confirm that the total power dissipated equals the total power supplied, demonstrating that ∑PR = ∑PS holds true.
Andriy B
Messages
2
Reaction score
0
Hi I'm taking an intro course to electrical and computer engineering and I'm having trouble figuring out part c of number one. I have attached a copy of my solutions to parts a and b which I believe are right (correct me if I'm wrong please) however when I calculate the power dissipation of each component and add them up I get a large number. Thank you in advance.
 

Attachments

  • Matlab_HW_2.pdf
    Matlab_HW_2.pdf
    199.6 KB · Views: 440
  • IMG_0300 (1).JPG
    IMG_0300 (1).JPG
    48.8 KB · Views: 761
Engineering news on Phys.org
" Determine the power dissipation of each component and show that the sum of the power dissipated equals zero "

Somebody was drunk while writting that assignement ? Dissipative components in that mesh are resistors. Sum of powers dissipated in them must be equal to sum of powers delivered by voltage sources.
 
So what's the correct way to solve part c?
 
After you find current of each branch, calculate power dissipated by every resistor (PR=IR2R).Sum these powers up to find total power dissipated in network. Power contribution of voltage source calculate as PS=Vs⋅I, where I is current through the source (pay attention to voltage source orientation and current flowing through it, depending on network parameters it may be negative). Then show that ∑PR= ∑PS holds
 

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Following up on the recent thread about Earth Resistance measurements'

I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
View full post »
Thread 'Electromagnet magnetic field issue'

Thread 'Electromagnet magnetic field issue'

Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
View full post »

Similar threads

What are these possible heat dissipation tubes?
Replies
11
Views
1K
Calculating the Power Dissipation of a Wire
Replies
23
Views
7K
Why do powerplants sell electricity for a negative price?
Replies
10
Views
1K
AC Circuit Analysis: Solving Example with Confusing Concepts
Replies
3
Views
2K
Calculating Resistivity across a mesh sheet
Replies
7
Views
5K
Power dissipated in this circuit with 2 batteries and 3 resistors
Replies
22
Views
4K
How are coils arranged in a power station generator?
Replies
8
Views
4K
Is Mesh Analysis Really Necessary in Electrical Engineering?
Replies
4
Views
2K
Maximum Power dissipated at load resistor
Replies
3
Views
941
Electrical Machines and Power Flow
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top