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#1




Thevenin Equivalent with a dependent source
Find the Thevenin Equivalent circuit between A and B
the circuit is in the attachments... i don't know how to start and what is the difference if A and B were for e.g after the 6V source? thanks 
#2




To find Thevenin's equivalent at terminals a & b you need to find
1. The open circuit voltage Vab = Vth. 2. The current flowing from a to b when a & b are shorted together. 3. Hence find Rth = Vab(open circuit)/Iab(short circuit) 
The Following User Says Thank You to Jony130 For This Useful Post:  
screen1988 (05012013) 
#3




Quote:
how can i find Vx? 
#4




Well first you need to find Vth voltages
So diagram look like this Vth =  V1 * R2/ (R2+R3) = 3.2V And now we need to find Isc So I write nodal equation (Va  (8V) )/3Ω = (0VVa)/1Ω + ( (5•Va)  Va )/2Ω So the only think you need to do, is to find voltage at Va node. 
The Following User Says Thank You to Jony130 For This Useful Post:  
screen1988 (05012013) 
#5




thank you, you are brilliant
Last edited by RedDead; 12122010 at 01:38 PM. 
#6




but where is the 4 ohm resistor which is parallel to the 8 volt source?

#7




Well I remove this resistor becaues it is connect parallel to the voltage source.
So this resistor has no effect on Va voltages. 
#8




Quote:
thanks again you saved me 
Tags 
dependent, equivalent, source, thévenin 
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