Removing Resistors for Same Output Voltage

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Homework Help Overview

The discussion revolves around a circuit problem involving resistors and output voltage, specifically focusing on maintaining an output voltage of 4V while considering the removal of certain resistors.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the relationship between resistors in series and parallel configurations, questioning how removing certain resistors affects the output voltage. There are attempts to calculate the EMF and current values to determine the feasibility of removing specific resistors.

Discussion Status

Some participants have provided calculations and reasoning regarding the EMF and current changes, while others are exploring the implications of removing resistors. There is no explicit consensus on the correctness of the proposed solutions, but various interpretations and approaches are being discussed.

Contextual Notes

Participants are working under the assumption that the output voltage must remain at 4V, and there is a focus on the current values associated with the resistors in question. The calculations and assumptions made regarding the EMF and current are part of the ongoing discussion.

TyErd
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Homework Statement


Provided that the output voltage is 4V, which one or more resistors can be removed to get the same output voltage.


Homework Equations


V=IR


The Attempt at a Solution


Im not sure if any working out is necessary here or not
 

Attachments

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Physics news on Phys.org
From the given data, find the emf of the cell.
To get the same output, what to do with X and Z so that the current in Y is 2 mA ?
 
Think about it this way: If you combined X and Y in series, you'd have two parallel resistors. If you removed one of those parallel resistors(Z!), the voltage across and the current through the other parallel resistor does not change.
 
okay EMF I calculated to be 6V, and then I combined X and Y to make another 3000ohm resistor and because I want output to be 4V, then that would mean current has to change from 2mA to 1.33mA correct? which means i can remove Resistor Z. Is that right I am not sure
 

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