- #1

Zarathuztra

- 36

- 0

## Homework Statement

Use the node-voltage method to find v

_{o}and the power delivered by the current source in the circuit in figure(Figure 1) if the v = 30V and the i = 1.6A.

#1: Use the node a as the reference node to find v

_{o}

#2: Use the node b as the reference node to find v

_{o}

#3: Find the power delivered by the 1.6A current source

I am stuck on the first one at the moment.

http://imageshack.us/a/img152/2156/eeehomework04p4.png [Broken]Left is the Given with my adjustment notes, right is modified result.

## Homework Equations

Kirchoff's Volt Law

Kirchoff's Current Law

Ohm's Law

Node-voltage method

supernode & mesh analysis

## The Attempt at a Solution

In the pic above you can see I combined the series resistances, 20+55=75. Then I combined the parallel resistors, 150 and the new 75 to get (150*75)/(150+75)=50. This problem instructs me to use node a as the reference, so I put the ground/ref. there for #1.

This is when I setup my node-voltage method equation.

node b: 1.6 + (1/50)V

_{b}+ (1/50)(V

_{b}- 30) = 0

This was the only equation I was able to make, and it gives me 0 for V

_{b}which is wrong... I'm probably handling the voltage source incorrectly in the problem.. Is the modified picture correct? If so, did I make an error with my equation for V

_{b}, or should I have a 2nd equation from node C?

Last edited by a moderator: