Equivalent circuits resistor problem

In summary, the conversation discusses finding the equivalent resistance (Req) in a circuit and different equations for calculating resistance in series and parallel circuits. The attempted solution involves breaking the circuit into two parallel sets and considering the voltage and completion of the circuit. The conversation also includes a link to a visual representation of the circuit for better understanding.
  • #1
DrummingAtom
659
2

Homework Statement



Find Req.


Homework Equations



Series: R1 + R2 + ...

Parallel: 1/(1/R1 + 1/R2 + ...)

The Attempt at a Solution



There's no solution for this one in the book but I'm thinking that I can break this up into two parallel sets. Parallel1 = (R1*R4)/(R1 + R4) and Parallel2 = (R3*R2)/(R3 + R2). Is that correct?
 

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  • #2
It's not exactly very easy figuring out that diagram, why not do it properly on paint and then upload the image?
 
  • #3
NewtonianAlch said:
It's not exactly very easy figuring out that diagram, why not do it properly on paint and then upload the image?

Yeah it didn't keep the white space. Sorry
 
  • #4
Your parallel2 is correct.

What is inbetween the right end of R4 and the bottom end of R1?
 
  • #5
Integral said:
Your parallel2 is correct.

What is inbetween the right end of R4 and the bottom end of R1?

The same voltage?
 
  • #6
Oh wait.. If I combine Parallel2 into the circuit as one unit it will now be in between the right end of R4 and the bottom end of R1.
 
  • #7
If you consider R1 and R4 in parallel, it has to be connected to the negative terminal right? What's helping completing the circuit?
 
  • #8
NewtonianAlch said:
If you consider R1 and R4 in parallel, it has to be connected to the negative terminal right? What's helping completing the circuit?

Parallel2
 
  • #9
http://slimber.com/index.php?image=resistors.g80803

See if that helps you visualize it better
 
Last edited by a moderator:
  • #10
NewtonianAlch said:
http://slimber.com/index.php?image=resistors.g80803

See if that helps you visualize it better

Sort of.. If it was drawn like that then would the solution be:

1/(1/R1 + 1/(R4 +R2) + 1/R3) ?
 
Last edited by a moderator:

1. What is an equivalent circuit resistor problem?

An equivalent circuit resistor problem is a type of circuit analysis problem where a complex circuit is simplified into an equivalent circuit with a single resistor, representing the total resistance of the original circuit. This allows for easier analysis and calculations.

2. How is the equivalent resistor value determined?

The equivalent resistor value is determined by calculating the total resistance of the circuit, which is the sum of all individual resistances. This is done using Ohm's law (R = V/I) or by using the formula for resistors in series or parallel depending on the circuit configuration.

3. Why is it important to solve equivalent circuit resistor problems?

Solving equivalent circuit resistor problems allows for better understanding and analysis of complex circuits. It also helps in designing and troubleshooting circuits, as well as predicting and controlling the flow of current in a circuit.

4. What are some common applications of equivalent circuit resistor problems?

Equivalent circuit resistor problems are commonly used in electrical and electronic engineering, as well as in physics and other related fields. They are used in the design and analysis of circuits in various electronic devices such as computers, phones, and appliances.

5. Are there any limitations to using equivalent circuits in resistor problems?

While equivalent circuits are a useful tool for simplifying complex circuits, they do have some limitations. They assume that all components behave as ideal resistors, which may not always be the case in real-world circuits. Additionally, they do not account for factors such as temperature and frequency which can affect the behavior of a circuit.

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