Nodal Analysis : Problem 1 - DC Circuits - Basic Electrical Engineering

Subject - Basic Electrical Engineering

Video Name - Nodal Analysis : Problem 1

Chapter - DC Circuits

Faculty - Hemant Jadhav

Watch the video lecture on the Topic Nodal Analysis : Problem 1 of Subject Basic Electrical Engineering by Professor Hemant Jadhav. Watch the Complete lecture on Engineering Academics with Ekeeda.

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[ameerasaid]

For Everyone who is wondering why he ignored the 2 ohm resistance. Firstly, this is the whole point of nodal analysis .You simply consider the currents in each node NOT the voltages . so your equations should be written in terms of CURRENT . If you were to solve it with the mesh method, yes you would consider that resistance because in that case you would be writing equation for VOLTAGE . In addition, in nodal analysis we consider the voltage at each node to have a higher potential energy and thus the current coming out of the node is the positive current.This means that the current direction in nodal analysis is assumed to be positive when coming out of the node and negative when coming into the node.The negative sign would then make our assumption accurate . There is no right direction. You can choose whatever direction you want to be positive but just be consistent and its better to have the above convention every time you solve nodal analysis problems

[bhabinbudujapun]

at node B:
4 = (Vb-Va)/4 + (Vb/2)
we can also do that.

[DHRI_]

For those who really wanna know, 2 ohm resistance is omitted because it is in series connection with the current source .

[mathracing]

Sir teachers ho too aapke jaisa kaya Lajabab teaching hai sir👍👍👍👍👍👍🙏🙏🙏🙏🙏🙏

[masterchoice]

Ur Devine.. For the students who prepare before 2days of the exams😂

[jasonheard]

It would have been helpful if you explained that the current flows from high potential to low potential, which is why you have the current going downwards at the 4 and 2 Ohm resistors in the middle of the drawing. Otherwise, this is a very helpful video...greatly appreciate you taking the time to post this.

[jitrajjana]

sir, is that always necessary to assume a zero or ground potential in case of nodal analysis based problems?

[JitendraKumar-yrmf]

At node A why you not consider the 2 ohm resistance ???

[saritaverma]

very nice sir.thanx.make more video on network analysis and synthesis.which is toughest subject

[vrithikagupta]

Very nice teaching sir, I got understand how to do...

[oreooreo]

Sir, isn't there only 2 nodes to be considered? Because the one you took as a reference has only one element. Sir please explain to me, I'm having some doubt

[prabirkumardey]

Sir since out going =incoming so at node B current is incoming towards node B so 4 A current should be on the right side of equal to sign but u have written it on the left side.Please explain.

[vamsiakula]

Super sir thank you I understood well ..😃

[palkeshdharejiya]

This circuit in replace value of 2A and 4A by 2V and 4V .

So, how I can solve this numerical ?

[Batman-ksqy]

Why don't you take ( at node a)

0-VA/2 its also a branch.... Including a current source and a resistance....
Someone pls... explain i have an exam tomorrow....

[jcwicyx]

In the center of 2A and node A 2ohm resistor .which is not use in solution why?

[julietnewton]

So painful I still dnt understand n I wanna know this

[bhattimobinkhan]

Why you have not taken 2 ohm resistance incalcution near node A

[vccmvjh]

Sir why in problem 1, you took the reference which is not actually a node? Aren't we take one node as reference node? As there were only two nodes so one should be taken as reference and that node's voltage should be zero.