Question

help me analyze this circuit please.

Answer 1

i am to use nodal analysis here.

Answer 2

could u find V1 from the equation u wrote?

Answer 3

is it 17.78v?

Answer 4

for I3 u must write (V1+10)/6
then u get V1 as 8 volts

Answer 5

ok. so that's my mistake. thank you so much! :)

Answer 6

but did u understand why v1+10 and not v1-10 ?

Answer 7

I used mesh current and got 8 Volts as well. Then went back and did nodal. Thank you for encouraging me to practice. ;)

Answer 8

i think so. but please elaborate still.

Answer 9

because of the polarity of 10V battery,can u see its opposite to that of 20 or 30V battery
thats why u wrote 20-V1 for I1 but 10+V1 for I3

Answer 10

Did you find the values of \[i _{1},i _{2},i _{3}\]? Wasn't that the point of the exercise?

Answer 11

No, that's what I did at first... that's mesh current analysis. They wanted Node voltage method.

Answer 12

ooh, you're right... they want the currents.

Answer 13

yea yea. i get it now. thank you so much for the help people. :)

Answer 14

I was just reading what was posted in the link, I also read what was posted "using nodal analysis. Using nodal analysis I have undetrstood the first step was to convert all voltage sources to current sources. I did not want to do that lol.

Answer 15

Nodal analysis was way easier than mesh to get the voltage common to the branches. After that, the individual currents are easy.

Answer 16

would you like some more exercises? :D

Answer 17

Yeah, start a new question. :D