Is this correct?

 

hi seb,
To check why not assign values to R2,R3 & R4||R5
Let V=9v R2 =3 , R3=3 and R4 & R5 =6 ohms each.
What Vout do you get.?
E

 

3.375=v5?

 

hi,
No,
What value is R4 and R5 in parallel, if they are both 6 ohms.?
E

 

3ohm is R4 and R5.
It´s 3 volt over v5.
Thought r2 was 2ohm.

 

hi,
Let R2 = 3 ohms , R3 = 3 ohms,.
If R4 = 6 and R5 =6, in parallel thats 3 ohms.
So you have a circuit with 3 resistors of 3 ohms in series., with a 9V supply.
What voltage must be across each 3 ohms.??

E

 

3V

 

R1 doesn't play any role in the V5 voltage calculation
R4 & R5 combined are a 3 ohm resistor, so as a voltage divider the V5 is 1/3 of the 9V meaning 3V

 

hi seb,
Yes.

So to check your equation. replace R2,3,4,5 with values we have used and you should get the same 3V answer if your equation is correct.
OK
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hi Doros,
This is Home work please do not give the TS a final answer.
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Sorry ericgibbs and seb, won't happen again

 

hi D,
It is not a problem. OK.
We try to make the TS work it out themselves, sometimes it has to be step by step process.
E

 

well understood

 

View attachment 226909
Is this correct?

Title: Understanding Basic Electronics, 1st Ed.
Publisher: The American Radio Relay League
ISBN: 0-87259-398-3