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

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AI Thread Summary
In the discussion on calculating current and voltage in a divider circuit, participants focused on the correct application of voltage divider principles. The voltage across two 100-ohm resistors was confirmed to be 1.25V, while the voltage Vx was recalculated to be 1.125V using the voltage divider rule for the 90-ohm and 20-ohm resistors. There was an emphasis on ensuring that potential drops do not exceed the supply voltage. Additionally, a suggestion was made to simplify calculations by multiplying the current i3 by 90Ω for efficiency. Accurate calculations are crucial for understanding circuit behavior.
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Homework Statement



Calculate ig, i0, i1, i2, Vx using current and voltage divider.

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The Attempt at a Solution



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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...
 
Yes you're right. I didn't pay attention to that.
V should be 1.25V(voltage divider on both 100 ohm resistors) and Vx = 1.125V (voltage divider between the 90 and 20//20 ohm resistors)
 
sevag00 said:
Yes you're right. I didn't pay attention to that.
V should be 1.25V(voltage divider on both 100 ohm resistors) and Vx = 1.125V (voltage divider between the 90 and 20//20 ohm resistors)

Muuuch better :smile:

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

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