Recent content by Yaz Li

Though it is late, but no harm in commenting. If you inspect that circuit, you will see that the voltage difference between terminals of the 40 Ohm is 120 V. The reason is that the positive terminal of the voltage source is connected to the other side of the 40 ohm resistor. Therefore, Io can...

If there is just one voltage source, it is easy to choose one of its nodes (usualy the negative terminal) as the reference node. For an example, check out this: http://circuits.solved-problems.com/resistive-circuits/problem-1-11-solving-circuit-nodes-nodal-analysis/ If there are more than one...

I think you are right. Superposition with voltage division can solve this. 1) Contribution of +15V: V=(2k||10k||5k)*15/(10k+2k||10k||5k)=1.25k*15/(10k+1.25k)=1.667V 2) Contribution of -15V: V=(2k||10k||10k)*(-15V)/(5k+2k||10k||10k)=1.429k*(-15)/(6.429)=-3.333V 3) Contribution of...

I think Vb-Va=10 -> Va=Vb-10. To see this, write a kcl around the loop starting from the reference node to Node A and then Node B: -Va-10+Vb=0 ->Va=Vb-10. I have explained this on one of my posts: http://circuits.solved-problems.com/resistive-circuits/nodal-analysis-supernode/ Scroll...