Series parallel combination circuit

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Homework Help Overview

The discussion revolves around a circuit analysis problem involving a series-parallel combination of resistors. The original poster seeks to determine the total resistance, the current at I1, the voltage across R6, and the current through I5.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants discuss identifying resistors in series and parallel, and suggest using Kirchhoff's laws to formulate equations. There is a focus on simplifying the circuit and questioning the impact of certain resistors on total resistance, particularly regarding R3 and R4.

Discussion Status

Participants are actively engaging with the problem, offering hints and clarifications about the circuit components. There is an acknowledgment of confusion regarding the application of Kirchhoff's rules and the role of specific resistors, indicating a productive exploration of the topic.

Contextual Notes

There is a mention of missing information regarding the resistance of one resistor in the circuit diagram, and participants are considering the implications of short-circuiting certain resistors on the overall resistance.

Alexeia
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Homework Statement



In the attached circuit diagram, I have to find the Total resistance of the cicuit, the current at I1, the voltage over R6 and the current through I5.

Homework Equations



V = IR

The Attempt at a Solution



Rt = 12Ohms
I1 = 1A
R6 = 6v
I5 = 1A

Homework Statement

 

Attachments

Last edited:
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Figure out which resistors are in series and which are in parallel. Then,try using a combination of kirchoff''s loop and junction rules to come up with a few linearly independent equations from which you can solve for the various I's. Also, Ohm's law is V = IR. See where that gets you.
 
Hello,

I re-attached my attempt, please have a look. I need to solve for the total resistance, current through I1, voltage over R6, and current through I5. I made an attempt by reducing the circuit to a simpler circuit. What confuses me is the current through I5, and whether R3 actually makes any difference to the total resistance of the circuit, because in my eyes it is as if it is bypassed by the wire carrying current I5.

Meant V = IR, sorry about that.

Help will be much appreciated. Thanks
 
Could you tell me what the resistance of the top right resistor is? It's not included in the diagram.
 
Its 24 Ohm, I re-scanned the diagram, has all info now..
 
Well, are you familiar with Kirchoff's loop rule?
 
I know his First law(current law), and Second law(Voltage law). Are you talking about one of them?


Just another question, if Resistor three is short circuited, does it add to the total resistance of the circuit or do I just ignore it?
 
Well, the loop rule states that the sum of all the potential differences around a closed circuit is zero (For a conservative electric field that is). Have a think about that in relation to the total resistance of your circuit.
 
Uhhh... I think I am a little confused now. But ill try to figure it out.. Thanks for the help
 
  • #10
Wait, I've totally jumped the gun here with using the rules. My apologies for any confusion!
 
  • #11
Hint: R4 the 10Ω resistor is shorted, it does not contribute anything. Remove it from the circuit all currents and voltages will remain the same.
 
  • #12
Integral said:
Hint: R4 the 10Ω resistor is shorted, it does not contribute anything. Remove it from the circuit all currents and voltages will remain the same.
Actually that's R3.
 

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