# Electric circuits proplem

Thread Starter

#### tinhnho

Joined Aug 31, 2004
34
hi everyone

i really need help with this proplems,i totally stuck from begin.

Given: R1= 2 ohm, R2 =1 ohm, R3= 3 ohm, R4= 2 ohm, R5 = 3 ohm, R6 =3 ohm
1. The voltmeter in the figure give a reading of v =1 V,and the resistances are given. Use the KCL and KVL to determine what the source woltage Vs must be in order to get this measured result. You will need to use both KVL and KCL, one node at a time or one branch at a time

p/s: sorry that my hand drawing picture

KCL = Kirchhoff's current law
KVL= Kirchhoff's voltage law
Vs= voltage source
Is= current source

Here is the Answers:
Vs= 20.666667
v1 = 6 ( where R1, R2, R3 join)
v2= 2 (where R3, R4, R5 join )

#### haditya

Joined Jan 19, 2004
220
can u post the circuit diagram

#### nithin

Joined Aug 27, 2004
15
defintely need the circuit diagram... because it doesn seem to be a ladder circuit or have you rounded off the values of v1 and v2

#### nithin

Joined Aug 27, 2004
15
you got to first find the equivalent impedence ..... so the current
I=(11*Vs)/31

V1=(9/11)*I (by current division)...

V2=(3/22)*I....

v=1=(3/22)*I...

you have to first find I and then substituting .. ull get the reqd. answers

#### Iwan

Joined Jul 14, 2004
23
Thread Starter

#### tinhnho

Joined Aug 31, 2004
34
sorry that i didn;t post the diagram, Anyway i figured out how to solve the proplem,thank you