Voltage Division: Troubleshooting Issues

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SUMMARY

The discussion centers on troubleshooting voltage division issues in electrical circuits, specifically addressing the misunderstanding of combining resistors in parallel. The key takeaway is that the voltage division principle relies on the conservation of current through series circuit elements, necessitating the calculation of equivalent resistance for parallel resistors. The participants emphasize the importance of not overlooking resistors, such as the 20 Ohm resistor, when determining voltage drops across circuit components.

PREREQUISITES
  • Understanding of Ohm's Law
  • Knowledge of series and parallel resistor configurations
  • Familiarity with equivalent resistance calculations
  • Basic principles of voltage division
NEXT STEPS
  • Study the concept of equivalent resistance in parallel circuits
  • Learn about the application of Ohm's Law in series and parallel circuits
  • Explore detailed examples of voltage division in complex circuits
  • Investigate troubleshooting techniques for electrical circuit analysis
USEFUL FOR

Electrical engineering students, hobbyists working with circuits, and professionals troubleshooting voltage division problems in electrical designs.

salman213
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I guess I do not understand voltage division properly can someone see why this doesn't work.

Why is the first one giving the wrong answer..?

thanks
 

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Yes, you have to combine the two parallel resistors into their equivalent resistance. Why did you ignore the 20 Ohm resistor in your first attempt?
 
It's true that the voltage drop across parallel circuit elements are always the same, but the voltage division principle is not based on that. Rather it's based on the conservation of current though 2 circuit elements in series. You have to find the equivalent resistance for the two elements because the 5 ohms is not in series with the 4 ohms.
 

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