Estimated equivalent resistance

In summary, estimated equivalent resistance is a measure of the combined resistance of multiple resistors in a circuit and is calculated by adding together the individual resistances in a series circuit or using a formula for parallel circuits. It is important in simplifying complex circuits and understanding their behavior. The placement of resistors in a circuit can affect the estimated equivalent resistance, and it is used in practical applications such as designing and troubleshooting electrical circuits.
  • #1
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!
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  • #2


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).
 

FAQ: Estimated equivalent resistance

What is estimated equivalent resistance?

Estimated equivalent resistance is a measure of the combined resistance of multiple resistors in a circuit. It represents the total opposition to current flow in a circuit.

How is estimated equivalent resistance calculated?

Estimated equivalent resistance is calculated by adding together the individual resistances in a series circuit or using the formula 1/Req = 1/R1 + 1/R2 + ... + 1/Rn for resistors in parallel.

What is the importance of estimated equivalent resistance?

Estimated equivalent resistance allows us to simplify complex circuits and determine the overall resistance of a circuit. It is an essential concept in understanding the behavior of electrical circuits.

How does the placement of resistors affect estimated equivalent resistance?

The placement of resistors in a circuit can affect the estimated equivalent resistance. In series circuits, resistors add up to create a larger total resistance, while in parallel circuits, resistors reduce the overall resistance.

How can estimated equivalent resistance be used in practical applications?

Estimated equivalent resistance is used in many practical applications, such as designing and troubleshooting electrical circuits in various devices and systems. It is also used in calculations for determining power and current in a circuit.

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