How Does Increasing Resistance Affect Current Flow in a Circuit?

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SUMMARY

The discussion focuses on the relationship between resistance and current flow in electrical circuits, emphasizing that as resistance increases, current decreases, demonstrating an inverse proportionality. Participants highlight the necessity of clarity in experimental setups, specifically regarding which resistances are varied and which are held constant during analysis. The importance of accurately labeling graphs and providing complete data sets is underscored to facilitate better understanding and communication of results. The conversation also stresses the need for precise definitions of circuit components involved in the experiments.

PREREQUISITES
  • Understanding of Ohm's Law and its application in circuit analysis.
  • Familiarity with circuit components such as resistors (R1, R2) and their configurations.
  • Basic knowledge of graphing techniques and data representation.
  • Experience with circuit simulation tools for experimental validation.
NEXT STEPS
  • Research the implications of Ohm's Law on circuit behavior with varying resistance.
  • Learn how to use circuit simulation software like LTspice or Multisim for visualizing current flow.
  • Study the principles of graphing electrical data, focusing on independent and dependent variables.
  • Explore advanced circuit analysis techniques, including Kirchhoff's laws and their applications.
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Electrical engineering students, educators, and hobbyists interested in understanding circuit dynamics and improving their experimental analysis skills.

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Homework Statement
Graphically represent in EXCEL or equivalent program the characteristics
current-resistance (abscissa) of the three currents in the circuit. Comment the obtained graphic.
(Hint: Plot the theoretical, simulated and experimental characteristics and compare the
differences between values and their evolution).
Relevant Equations
U=RI (OHM'S LAW)
For example given the circuit
Captura de ecrã 2021-11-20 201327.png


I make the graphs :
Captura de ecrã 2021-11-20 201958.png


and comment that or graph 1 as resistance grows larger the current grows smaller (is inversely proportional) I will use the simulation and experimental data to check the values and conclude that this act is true.
Is this what I'm supposed to do?
 
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Those are odd-looking graphs. Where do those numbers come from? Which branch(es) of the circuit do the graphs refer to? What is being varied and what is constant? (e.g. if you are plotting the current through R2 as R2 varies, is R held constant? At what value? This is important, though the question as quoted doesn't make it clear.)
 
mjc123 said:
Those are odd-looking graphs. Where do those numbers come from? Which branch(es) of the circuit do the graphs refer to? What is being varied and what is constant? (e.g. if you are plotting the current through R2 as R2 varies, is R held constant? At what value? This is important, though the question as quoted doesn't make it clear.)
Above the graph you can se the values o current and resistance and I apologise or not explaining that the order goes rom top to botom:R1,R2,R.
 
But that is meaningless. Each set of values {R1, R2, R} will be associated with a particular value of the current - or, to be precise, with a particular set of values {IR1, IR2, IR}. What you need to do is graph one of these current values as a function of one of the resistances, e.g. IR vs. R while holding R1 and R2 constant. And do this in turn for each of the 3 currents.
 
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mjc123 said:
the question as quoted doesn't make it clear
This ^^^.
Can you post the complete question? Maybe post a (good) picture with your phone?
What component values are fixed, and which are varied in the analysis?
 

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