How to calculate voltage at a specific resistor

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Homework Help Overview

The discussion revolves around calculating the voltage at a specific resistor within a parallel circuit, particularly focusing on the impact of shorting a resistor on current flow.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants discuss using Kirchhoff's rules and Ohm's law to analyze the circuit. Questions arise regarding the specific setup and the implications of shorting a resistor on current through another resistor.

Discussion Status

The conversation includes attempts to calculate current values under different conditions, with some participants seeking verification of their calculations. There is an acknowledgment of the need for clarity in the original question posed.

Contextual Notes

Participants are working with specific resistor values and circuit configurations, but details about the circuit diagram and initial conditions are not provided, leading to some assumptions being questioned.

Gardalay
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Homework Statement



How would you calculate the voltage at a specific resistor given that it's a parallel circuit.
 
Last edited:
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Welcome to PF!

Hi Gardalay! Welcome to PF! :smile:

Use Kirchhoff's rules to find the current through it, and then use Ohm's law :wink:

(but what exactly is the question?)
 
If the 25ohm resistor in figure19-39 were shorted out, what then would be the current through the 10ohm resistor?
 

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Call the currents through each section i1 i2 i3 etc, and apply Kirchhoff's rules …

what do you get? :smile:​
 
I got 7.14amps with the 25ohm resistor and 6.9amps without the 25ohm resistor.
 
Show your calculations if you want us to check them! :smile:
 
ok, i finally got this figured out, thanks for the help
 

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