Calculating Voltage in a Simple Divider Circuit

[fonz]

Homework Statement

Not technically a homework question but part of a piece of work I am studying. I need to calculate the voltage at the node in between the 10k and 27k resistors in the following schematic. I'll call it Vo.

https://www.physicsforums.com/attachments/213624

Homework Equations

KVL

The Attempt at a Solution

[/B]
By KVL:

15 - i(10k) - i(27k) -15 = 0

i(-37k) = 0

So I can't work out the current and therefore can't work out the voltage.

 

[BvU]

Still to be posted in homework. Never mind. What about the signs (all four of them...) ?

 

[berkeman]

The notation is a bit confusing, but whatever. The right-hand voltage source is shown with the + end toward the resistors, but the value of the supply is shown as -15V. So the left end of the resistors is sitting at +15V and the right end is at -15V. So what is the voltage across the string of resistors?

 

[berkeman]

Thread closed for Moderation...

 

[berkeman]

OP deleted his question after receiving help on homework. That is not allowed. Poster is on a short vacation from the PF.

The image in his (now restored) OP was two voltage sources, +15V at the left and -15V at the right, and two resistors in the middle as a divider. Thread is closed and archived.