Estimated equivalent resistance

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SUMMARY

The discussion focuses on estimating equivalent resistance in a circuit without relying on calculations. A participant highlights that when one resistor has ten times the value of another, it acts as a minor load, suggesting that the equivalent resistance will be slightly less than the smaller resistor's value, specifically by about one-tenth. This approach emphasizes intuitive reasoning over mathematical formulas, such as the standard formula R1 * R2 / (R1 + R2).

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  • Familiarity with Ohm's Law and its applications.
  • Knowledge of series and parallel resistor configurations.
  • Ability to interpret circuit diagrams.
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nobrainer612
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"Estimated" equivalent resistance

Homework Statement



Suppose I have a circuit like the one below, how will you "estimated" the equivalent resistance without using calculation?

I know how to calculate equivalent resistance by using Formula: R1 * R2 / (R1+R2) . But can anyone use their logic and estimate the equivalent resistance without using any formulas?

Thank you!
b67q1g.jpg
 
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One resistor has 10X the value of the other, so it represents a minor "load" compared to the smaller resistor. So the net resistance should be just a shade under the smaller resistance (by about one tenth).
 

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