- #1
elecstudent1
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Homework Statement
Need to establish a Thevenin equivalent for the circuit attached.
Homework Equations
None given. Need to use Kirchhoff.
The Attempt at a Solution
I worked out the following:
I said that R3 and R4 are in series as there is no current splitting because 0A flows into the open-circuit.
Then I said that R2 is // to (R3+R4) and modeled that as a new resistor R6 with a value of 2.25 k-ohms. I then said that R1 is in series with this R6 and got a new R7 of 3.25 k-ohms. I then worked out the current is 3.7 mA.
I then wrote that the Vth (Thevenin Voltage) is equal to the p.d. over R4 relative to ground which was 3.7 mA * 5 k-ohm which ends up around 18 V so it's clearly wrong.
Any advice please?