Circuits with parallel resistors

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Homework Help Overview

The discussion revolves around a circuit problem involving parallel resistors, specifically focusing on voltage across resistors and current calculations in a parallel configuration.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to determine the voltage across each resistor in a parallel circuit and calculate the current flowing through one resistor based on given values and relationships in parallel circuits.

Discussion Status

Some participants affirm the original poster's reasoning regarding the voltage across the resistors and the current calculations, indicating a supportive environment for the original poster's thought process. However, there is no explicit consensus on the correctness of the calculations.

Contextual Notes

Participants express some uncertainty about the calculations, particularly the original poster's confidence in their reasoning. The discussion does not resolve the correctness of the final answers provided.

chiurox
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Homework Statement


1) A circuit contains a 10V battery and three resistors in parallel. The resistors have values R1=10ohm, R2=40ohm, R3=50ohm. What is the voltage across each resistor?

2)This time, the 3 resistors in parallel have values R1=10ohm, R2=20ohm, R3=500ohm. The current flowing through R2=100mA. What is the current flowing through R1?


Homework Equations





The Attempt at a Solution


1) 10 V across each, because the voltage is the same across parallel resistors right?

2) I made a V-I-R chart. Since R2 has a current of 100mA and its resistance is 20ohm, then the voltage is 2.0V. Since the resistors are in parallel, the voltage is the same for R1.
So 2volts=I(10ohm)
I=200 mA is this correct?
 
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Hi chiurox,

That looks correct to me.
 
yeah that's absolutely right
 
Oh... ok, I was a bit insecure. thanks
 

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