Can you please help me on this question with it's solution? Because I really don't have any idea on how I would get the Voltage on a Current Source.

 

Remember that Nodal Analysis is just a systematic application of KCL, so apply KCL at each node by summing up the currents leaving each node along all the branches connected to that node. For branches connected to an independent current source, that is trivial.

You need to show YOUR best attempt to work the problem to go further.

 

Nodal Analysis is just a procedure. Follow these steps:

1. Identify the nodes.

2. Write the node equation for each node, i.e., The sum of all currents leaving the node equals zero. Current leaving the node is positive. I1+I2+I3+...=0

3. Each term in the node equation begins with the voltage of that node. Each current term has the form:
(Vnode - Vother)/(resistance between node and other node). Current for a current source is as given.

4. Solve the node equations for the node voltages.

 

Ans: V3A = 5.235 V; V7A = 11.47 V. This is the answer base on the book. Please tell me what mistake I've done. Even there a little difference I think there's some mistake on my work. Gonna appreciate your help

 

Have you tried to read that file? Needs more resolution.

 

Ans: V3A = 5.235 V; V7A = 11.47 V. This is the answer base on the book. Please tell me what mistake I've done. Even there a little difference I think there's some mistake on my work. Gonna appreciate your help

You need quite a bit better resolution on that image.

And keep in mind that some of us have older eyes than others.

Make sure YOU can easily read the image. You probably need a file size in the 50 kB to 200 kB range.

 

Even though I can't see how you did it, we both got the same answer. Here is how I did it but still want to see how you did the nodal analysis.

 

Sorry for the low resolution. Here the new image

 

Even though I can't see how you did it, we both got the same answer. Here is how I did it but still want to see how you did the nodal analysis.
View attachment 135922

It is better to assume that all current across the nodes are leaving?

 

It is better to assume that all current across the nodes are leaving?

It is better to be consistent in your approach. Look at your equation for "KCL at node V1" and notice that there is a term with no "V1". That seems to be an obvious mistake, and one that you would likely not have made had you followed the procedural steps as previously outlined.

 

It is better to be consistent in your approach. Look at your equation for "KCL at node V1" and notice that there is a term with no "V1". That seems to be an obvious mistake, and one that you would likely not have made had you followed the procedural steps as previously outlined.

Thanks sir. I got the answer now.