How to calculate voltage at a specific resistor

AI Thread Summary
To calculate the voltage at a specific resistor in a parallel circuit, apply Kirchhoff's rules to determine the current through that resistor. Use Ohm's law to find the voltage once the current is known. A specific example discussed involved calculating the current through a 10-ohm resistor with and without a 25-ohm resistor shorted out, yielding results of 7.14 amps and 6.9 amps, respectively. Participants encouraged sharing calculations for verification. The conversation concluded with the original poster successfully resolving their question.
Gardalay
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Homework Statement



How would you calculate the voltage at a specific resistor given that it's a parallel circuit.
 
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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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