I've been posed with with following question:
I thought that using a thevenin replacement circuit would be best, because then i wouldn't have to do nodal analysis every single time for the circuit. However i've run into a slight hickup. I've calculated the Thevenin resistance quite easily to be 8ohms. However i am stuck on trying to figure out the Thevenin equivalent voltage. My working out is as followed. I calculated the current in each loop.
These were obtained from the following 3 equations:
-24 + 8(i1) + 8(i1-i2) = 0
i2 = -5
i3 = 8(i3-i2) + 8(i3) + 8 = 0
subbing i2 into them i get:
i1 = -1A
i2 = -5A
i3= -3A
This just means i've assumed the wrong current flow and in reality it is flowing the other way correct?
-V1 = 4A(in direction of i2)(8ohm) = 24 , v1 = -24
-V2 = 2(in direction of i2)(8ohm) = 16, v2 = -16
-V1 + V(therevin) +V2 = 0
V1 - V2 = V(therevin)
-24 +16 = -8V Which would imply that the terminals are the other way correct? i.e V2 = positive & v1 = negative ??
Could you please tell me where i went wrong. how i should be approaching it, and what the answer is, so that when i try it again i'll have something to compare it to. I'm absolutely stumped with this one
Best Wishes,
A very confused and troubled student
I thought that using a thevenin replacement circuit would be best, because then i wouldn't have to do nodal analysis every single time for the circuit. However i've run into a slight hickup. I've calculated the Thevenin resistance quite easily to be 8ohms. However i am stuck on trying to figure out the Thevenin equivalent voltage. My working out is as followed. I calculated the current in each loop.
These were obtained from the following 3 equations:
-24 + 8(i1) + 8(i1-i2) = 0
i2 = -5
i3 = 8(i3-i2) + 8(i3) + 8 = 0
subbing i2 into them i get:
i1 = -1A
i2 = -5A
i3= -3A
This just means i've assumed the wrong current flow and in reality it is flowing the other way correct?
-V1 = 4A(in direction of i2)(8ohm) = 24 , v1 = -24
-V2 = 2(in direction of i2)(8ohm) = 16, v2 = -16
-V1 + V(therevin) +V2 = 0
V1 - V2 = V(therevin)
-24 +16 = -8V Which would imply that the terminals are the other way correct? i.e V2 = positive & v1 = negative ??
Could you please tell me where i went wrong. how i should be approaching it, and what the answer is, so that when i try it again i'll have something to compare it to. I'm absolutely stumped with this one
Best Wishes,
A very confused and troubled student