What are the formulas for calculating current and voltage in a divider circuit?

[sevag00]

Homework Statement

Calculate i_g, i₀, i₁, i₂, V_x using current and voltage divider.

The Attempt at a Solution

http://s13.postimg.org/77gjkkmgn/001.jpg

 

[gneill]

You were doing fine until you got to the calculation of Vx. There's no way a potential drop in the the circuit can be larger than the supply voltage...

 

[sevag00]

Yes you're right. I didn't pay attention to that.
V should be 1.25V(voltage divider on both 100 ohm resistors) and V_x = 1.125V (voltage divider between the 90 and 20//20 ohm resistors)

 

[gneill]

Yes you're right. I didn't pay attention to that.
V should be 1.25V(voltage divider on both 100 ohm resistors) and V_x = 1.125V (voltage divider between the 90 and 20//20 ohm resistors)

Muuuch better

You could also have just multiplied your i3 by 90Ω.

 

[sevag00]

Yay!