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

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Homework Help Overview

The discussion revolves around calculating current and voltage in a divider circuit, specifically focusing on the use of current and voltage divider principles.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate various currents and voltages in the circuit but encounters an issue with the potential drop exceeding the supply voltage. Some participants question the validity of this calculation and suggest reevaluating the voltage values derived from the voltage divider.

Discussion Status

Participants are actively engaging in clarifying the calculations, with some providing feedback on the original poster's approach. There is a recognition of the need to correct the voltage values, and suggestions for alternative calculations have been made.

Contextual Notes

There appears to be confusion regarding the voltage drop in the circuit, which has led to a reevaluation of the values used in the calculations. The discussion reflects a focus on ensuring that assumptions about the circuit's behavior align with fundamental principles.

sevag00
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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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