Calculate the current between point A and B

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SUMMARY

The discussion focuses on calculating the current between points A and B in a circuit with resistors R1 (3 Ohm), R2 (6 Ohm), R3 (4 Ohm), and R4 (4 Ohm) under a voltage of 12V. The total resistance is calculated using the formula for parallel resistors, resulting in a total current of 3 A. Participants clarify the correct application of Ohm's Law and the concept of voltage drops across resistors in parallel, ultimately determining the current flow direction from A to B.

PREREQUISITES
  • Understanding of Ohm's Law (U = R * I)
  • Knowledge of series and parallel resistor configurations
  • Ability to calculate total resistance in parallel circuits
  • Familiarity with voltage drop concepts across resistors
NEXT STEPS
  • Learn how to calculate current through individual resistors in parallel circuits
  • Study the implications of voltage drops in series and parallel configurations
  • Explore advanced circuit analysis techniques, such as mesh and nodal analysis
  • Review practical applications of Ohm's Law in real-world electrical engineering scenarios
USEFUL FOR

Electrical engineering students, hobbyists working on circuit design, and anyone seeking to deepen their understanding of current flow in electrical circuits.

  • #31
SammyS said:
From the direction of current through R1 and R3 and the difference in the currents.

Double check all results by considering R2 & R4 as well.

Yeah that makes a lot of sense! The direction of the current must be from A to B then.
 
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  • #32
meguco0314 said:
Yeah that makes a lot of sense! The direction of the current must be from A to B then.
Yes.
 
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  • #33
wow, that was exhausting - but well done SammyS, that was an excellent walk though.
 
  • #34
William White said:
wow, that was exhausting - but well done SammyS, that was an excellent walk though.
Thanks.

@Qwertywerty ,

Your suggestions were fine, but I felt that meguco0314 would benefit from using basics rather than using a proportionality argument for finding individual currents.
 
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  • #35
Yes thank you so much! Your help was awesome! I learned more than a thing or two from this, and I hope others will benefit from this thread as well. :)
 

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