How to calculate what a voltmeter measures with multiple resistors?

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Homework Help Overview

The discussion revolves around calculating the voltage measured by a voltmeter in a circuit involving multiple resistors. The subject area includes concepts of electrical circuits, specifically voltage dividers and circuit simplification techniques.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss removing the voltmeter to simplify the circuit and analyze the voltage across individual resistors. There is mention of using voltage dividers and redrawing the circuit for clarity.

Discussion Status

Some participants have provided hints and suggestions for redrawing the circuit and recognizing the presence of voltage dividers. There is an emphasis on the importance of posting attempts to facilitate learning, though no consensus has been reached on a solution.

Contextual Notes

Participants are reminded of forum rules requiring them to demonstrate their attempts before receiving further assistance. There is a focus on ensuring that the analysis remains valid without the voltmeter in the circuit.

Rasias
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Homework Statement
Calculate what the voltmeter measures
Relevant Equations
Req=R1+R2+...+Rn
I tried to solve it by removing the voltmeter and simplifying it to just one resistor, then calculate the individual volts and then the deltaV, but still didn't found the answer, can you guys help me?
Screenshot_2019-04-06-22-50-03.png
 
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If you take out the voltmeter for the moment, do you see that you have two voltage dividers? Does that help?
 
Rasias said:
still didn't found the answer,
Per forum rules, please post your attempt.
 
What if you redraw the circuit? Redraw, without the voltmeter, and with R1 & R3 in a straight vertical line, and parallel to that, R2 & R4 in a straight vertical line. The new drawing should be equivalent to the original (ignoring the lack of the voltmeter). Now, as @lewando said, do you see that you have two voltage dividers? If you want help understanding how leaving the voltmeter out (for analysis purposes) can be valid, just ask for another hint.
 
haruspex said:
Per forum rules, please post your attempt.
This is not haruspex being excessively fussy -- Physics Forums scolds us if we do not require you to make an attempt. And it will help your learning process. (In fact, I might be scolded for the tip I gave you earlier.)
 

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