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**nodal analysis**we always have to designate a reference node (which will be the

**ground node**) as a reference for measuring the others' voltages. However I was practicing this and I found this example on http://mathonweb.com/help/backgd5b.htm:

https://scontent-atl3-1.xx.fbcdn.net/hphotos-xlp1/v/t1.0-9/11205488_1641308579487013_7202709367008535386_n.jpg?oh=1008d277d5d6a59d6e351ba41bb3af4e&oe=56601DF3

It seems that one of them will be the reference or ground node (this means one of them will be at 0 V). The problem chose node N2 as the reference node. After using Kirchhoff's current law for each node they found that:V1=-35.88 V

V2=0 V

V3= 63.74 V

V4= 0.19 V

My question is:

**what if I chose another node (for example N4) as the reference node for measuring the other voltages? Would it change my final results? And if it did so, how to know which node will be the real reference node?**And I'm questioning this because I did this circuit on an online simulator and it turned out that those were the correct results so it seems that they chose the right node as the ground (

**I know that when we have to choose the reference node it is easier to choose that node the one that has more branches, but in this case both N2 and N4 have the same number of branches connected to them)**. I'm leaving the URL here for that simulation

http://lushprojects.com/circuitjs/c...84+0+60 v+192+384+192+296+0+0+40+300+0+0+0.5