Scroll up and hit that 👍 button if you found this video helpful! Full circuits playlist is here: th-cam.com/play/PLOAuB8dR35ocf9Typ1iX9NRmX0V04UYfQ.html
@ 7:31 "And we can see here I_3 has to be switched..." DON'T EVER DO THAT! The current values you obtain are consistent with directions of current flow assumed in your diagram in the first place. If any of them are negative then that just means they actually flow in opposite direction than what you assumed. But don't change you diagram. To do so introduces a possible source of error for future calculations. In the meantime, you're engineers. You're supposed to be able to figure out what a minus sign means.
@@CGBDChannel-k5u As he is using that word in this context, yes. To do nodal analysis properly you have to assume direction for each branch current. When you've solved the problem completely if the values of any of your branch currents are negative then it means that you chose the wrong direction of current flow for those branches that have negative currents. But don't change directions on your diagram.
Are matrices always better for solving for the voltages at the nodes or are simultaneous equations ok? I know they are basically the same thing but i just thought it worth asking
When the arrow is pointing at A (for example) is coming in, but if its pointing the opposite direction then its coming out. Same with be, if it's pointing at B is coming in, if it's pointing the opposite direction is out.
Scroll up and hit that 👍 button if you found this video helpful!
Full circuits playlist is here: th-cam.com/play/PLOAuB8dR35ocf9Typ1iX9NRmX0V04UYfQ.html
I love the way you color coded the nodes, very helpful! Thanks
The example and narration are captivating. I appreciate it!
Taught this to me in one night. You are amazing. Thank you!
It took me 2 nights and 1 day to understand
Thank you so much for this Chanel! I will make use of these videos this semester 😁
Awesome!! Glad to hear it =)
Sir i hated electrical science , but you are teaching in such a way that i have started loving it , THANK U SIR , THANKS FROM INDIA
Great video :) A future video on supernodes before covering mesh analysis would be helpful
Thanks!! And yep, I do plan to cover supernodes too =)
absolutely hate my network theory professor, this video helps alot
Glad i can help. There are more examples at engineer4free.com/circuits
How do u determine and identify the three nodes in the first place? The rest was very well explained. Thanks!
Hey try this video, I explain the method: th-cam.com/video/f-sbANgw4fo/w-d-xo.html 👌
@ 7:31 "And we can see here I_3 has to be switched..."
DON'T EVER DO THAT! The current values you obtain are consistent with directions of current flow assumed in your diagram in the first place. If any of them are negative then that just means they actually flow in opposite direction than what you assumed. But don't change you diagram. To do so introduces a possible source of error for future calculations. In the meantime, you're engineers. You're supposed to be able to figure out what a minus sign means.
So switch means from negative to positive? As I_3 is leaving the node B
@@CGBDChannel-k5u As he is using that word in this context, yes. To do nodal analysis properly you have to assume direction for each branch current. When you've solved the problem completely if the values of any of your branch currents are negative then it means that you chose the wrong direction of current flow for those branches that have negative currents. But don't change directions on your diagram.
Nice work highlighting the nodes.
Really good and clear explanation
How do we know that the color coded nodes are taken as the same node? I am so very confused
thank you very much, you made everything clear.
طريقة الشرح رائعة جدًا ، استمر 👍🏻
Thanks alot ......
can you tell us how do you find the lastest result did you use matrix?
same problem
If you are referring to V1, V2 and V3. That would be EQN
how did it become 5.38, 3.94, and 3.69? can you care to explain?
Wouldn’t it make it a little easier to do a simple transformation with the 1Ohm resistor and that current in parallel with it?
Thank you so much sir for this information
how can you solve or input in a calculator to find the answer ?
Thank you very much, Sir
what if we have another current source on the upper loop?
Can you pick any node as a reference voltage or only the one with the most branches
you are amazing thank you
What would be equivalent resistor of this circuit?
Thank you.
You're welcome!! =)
Confused at node C I see two nodes on that end
Sir please add more examples, thanks.
Are matrices always better for solving for the voltages at the nodes or are simultaneous equations ok? I know they are basically the same thing but i just thought it worth asking
depends on your calculator, for me simultaneous equations are easier
thanks👍👍
thank you
You're welcome!! =)
U made me smart
how do you say which current is moving in and which current is moving out
When the arrow is pointing at A (for example) is coming in, but if its pointing the opposite direction then its coming out. Same with be, if it's pointing at B is coming in, if it's pointing the opposite direction is out.
Great
Thanks! =)
I thought if its negative means it is leaving the node
Why didn't you considered four nodes instead of three
because the bottom node is considered a ground node, so it stays as 0v
I love you so much 😘😘❤️❤️❤️
love it
If Va > Vb then Vb should be greater then Vc 🤔 So why you call Vc greater than Vb
Sir I use cramer's rule for the voltage ..and it seems that it didn't match the answer given by my instructor ,why's is that?
4.25, 1.312, 3.69
There the same using Cramer's law unless Vb it's quiet different but that much
I just did calculation in my calc and got different answers than yours. VA=1.625, VB=0.5625, VC=-1.1875. Someone please verify.
probably outdated, but i got the same result as you...
Am I the only one who got the values of A,B and C as 1.625, 0.5625 and -1.1875 ?
i got Va= 4v, Vb=3v and Vc=3v and i was so sure i got it right cause my numbers are nice and rounded :(