Question

hey i'm intrigued by a circuit analysis question which my prof challenged me with.. can any body help me solve it?

Answer 1

is this your question?

Answer 2

i'm attaching a jpeg of the circuit

Answer 3

what u need to find in the circuit?

Answer 4

the node voltage labeled v

Answer 5

Do you know Kirchoff's laws?

Answer 6

yes i do.. i tried kvl, kcl, power conservation principle everything..
and yet i can't find v

Answer 7

What's the voltage on that power source? I can't quite make it out: 10V, 15V?

Answer 8

10v

Answer 9

10V

Answer 10

one fundamental hint....you don't need to solve....it can be done orally just by analysis and viewing circuit :)

Answer 11

And what's that over on the right side? is that a 2 ohm resistor?

Answer 12

yes it is a 2 ohm res

Answer 13

@jayantb1019 one more hint....there is no current in 3 ohm resistor....can you guess how? :)

Answer 14

@jayantb1019 ??

Answer 15

i got it as 7/6 A anticlockwise in 3 ohm

Answer 16

no

Answer 17

see sume of 4 ampere and 3 ampere is 7 ampere...which is given in the circuit ...so no current flows in 3 ohm arm....look at the circuit again :)

Answer 18

Are you sure that makes sense? What is the total equivalent resistance for the circuit and how much current is flowing back into the power source?

Answer 19

there's a 10v voltage source also supplying current, assume current in 3 ohm as x, deduce currents in the peripheral branches using kcl and apply kvl to the outer loop. it turns out to be 7/6 A in 3 ohms

Answer 20

well....i am still confident at my answer....there is no need to calculate ...you guys can find answer just by analysis of it...

Answer 21

hey i need the voltage v, not the current through 3 ohms res

Answer 22

yes exactly....so eliminate that arm...your calculation or analysis would be easier

Answer 23

guess wat i cant find the equivalent resistance of the circuit!!!! it seems impossible

Answer 24

Do have a way to find total current and do individual voltage drops across each resistor?

Answer 25

yes kcl and kvl, i already did that

Answer 26

i'm posting a text file which has the currents across each resistor and how i obtained it

Answer 27

consider left node as v1 and right node as v2 then apply kcl

Answer 28

hey dint get you

Answer 29

left most and right most nodes apply kcl at them, dont assume any x just take direction of currents

Answer 30

ya i got the currents across each resistor already

Answer 31

hey its coming to zero volts

Answer 32

thanks everyone for the insights

Answer 33

how?

Answer 34

take the node with voltage v as the datum node and apply nodal analysis,

Answer 35

ur assuming reference node to a node at which you need to find voltage is is correct

Answer 36

i'm not sure bt this is wat i got.. if u ve a person whose got more reliable solution, let me no

Answer 37

i might go offline.. mail me k.. jayantb1019@hotmail.com

Answer 38

ok