assignemnt help

Thread Starter

UADV

Joined Nov 22, 2012
5
hi all im on an electrical and electronics engineering course and and assignemnt to do, i was wondering if anyone could help me , in trying to find the formula or eqwuation need to find missing resistor value(s) , also could anyone explain how you do a mess circuit equation , i have most of it but when i look online throgh various forum and website the ending part is never explained so little lost can anyone help please thanks Jules
 

Audioguru

Joined Dec 20, 2007
11,248
Ask your teacher to explain Ohm's Law again to you.

Oh, you don't have a teacher but instead you are taught electronics by a robot?
Then ask the robot to explain Ohm's Law again to you.
 

Audioguru

Joined Dec 20, 2007
11,248
You are asked about "a parallel circuit with a series resister".
What is a "resister"? Is it a resistor with no value?

Why don't you post the detailed schematic then we will know what you are talking about?
 

Thread Starter

UADV

Joined Nov 22, 2012
5
ok nps give me a few mins and i will try to explain properly with a schematic, all i ask is please dont give me the answer just give me to equation(s) its important to me that i learn this thank you
 

WBahn

Joined Mar 31, 2012
29,976
Okay, let's see if we can give you some real assistance here.

Let's focus on the first problem first, but even before we do that, consider the following:

You are trying to determine an unknown resistance.

Q1) What two peices of information directly related to that resistance do you need?
.
Our goal is to figure out those two peices of information for each unknown resistor.

So turning to the first circuit (Circuit 4):

Q2) What is the voltage on Node 2 (the node just to the left of R6) based only on the information provided by the left-most branch? Assume that the current meters are ideal (what does that mean?) or at least nearly so.

Q3) What is the voltage on Node 2 based just on the information provided by the second branch (the one with R2 in it)?

Q4) Are the answers to Q2 and Q3 consistent?

Q5) Based on the currents in the left two branches, what is the current through R6?

Q6) Based on the information in the third branch (the one with R3) what is the voltage on Node 3?

Q7) Based on the information in the right-most branch, what is the current in R5?

Q8) Based on the answers to Q6 and Q7, what is the voltage on Node 4?

Q9) Based on the currents in the right two branches, what is the current in R6? Is this consistent with the answer to Q5?

Q10) What are R5 and R6?

Answer these, in order, the best you can. Provide your reasoning, if possible. Then we can look your answers over and see what is right and what misconceptions or holes need to be addressed.


Q2) In
 
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