Question

9. In Circuit 5 below: OB Circuit 5 a. Find the Thevenin equivalent for this circuit by calculating Voc and RzEQ. Note that you can't calculate Isc because shorting A and B would result in an invalid circuit. b. Do resistors in parallel with voltages sources affect the rest of the circuit?

Answer 1

R =R *The venin's Voltage (Vin) = Voc =VAB Hs, AB are connected with the voltage source cus) in parallelo VAB will be equals to Vs. is von= Voe = VnB = Vs on N2 =Vs] -> To find Thevenin's Resistance (Ain), o Voltage sources should be shorted. Current source should be opened. (LID) Then,measure (RAB), where Rth= RAB. > Here, RAB=021 } a {一 because, They are Shapted. So. Thevenin's Equivalent Circuit

Rth - Ол Th=Vs LA Ass or means Short-circuit L B Here, Ri, R2 was in parallel with the bl tage sources. 1. From the Thevenin's fquivalent Circuit It seems it does not affect the rest of the circuito So, No, It does not affect the pest of the circuito

In case the resistances are in series with the source, The Thevenin's equivalent voltage (Vth) will be same as Vs.

As, A and B are opened, so no current will flow form A to B, so no voltage drop across the Series resistors.

But in case to find the Thevenin's equivalent Resistance (Rth), It will be same as the equivalent of the series resistances connected with the voltage sources.

So, In the equivalent Thevenin's Circuit for series resistances, It affect the rest of the circuit as Rth is not Zero.

But For parallel resistances, It does not affect the rest of the circuit.

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