# Questions tagged [thevenin]

Thévenin's theorem for linear electrical networks to simplify the analysis of complex electrical circuits.

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So I am currently working on thevenin theorem and I come across this question. So in the question there is a circuit consist of two batteries with same voltage but different internal resistance, a ...
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### In the circuit shown in the given figure 3, RL will absorb maximum power when its value is 0/1

In the circuit shown in the given figure 3, RL will absorb maximum power when its value is 0/1
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### Resistor value of R1 and R2

i came across a problem in circuit analysis ,i have given a circuit and it's thevenin equivalent circuit Given Parameters are R3(load resistor)=10k, Rth=40.2k,Vth=5v and in the circuit diagram on left ...
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### How do I find the effective resistance of a Thevenin circuit if the points are in between resistors

I just started taking classes on circuit analysis. have a question regarding this Thevenin circuit. My end goal is to find the maximum power that can be obtained at A and B. I managed to find the ...
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### Is resistance the derivative dV/dI or the ratio V/I?

I'm trying to understand the justification for turning off independent sources when calculating the equivalent resistance in Thévenin's theorem. This answer explains has a good explanation but it ...
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### Why does the mesh current equal for Thevenin's Equivalent

The question wants us to find the thevenin's equivalent of this circuit. Vth is across R. The 5ohms and 6A was transformed into a series voltage and resistance. The answer shows that the first loop is ...
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### Working out theveni. Voltage with no voltage source

How do i get the thevenin voltage having worked out the load impedance and obtained it as 3.415 -j0.7317 ohms
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### Calculating Thevenin's open circuit voltage

I am unsure how to calculate $V_{Th}$ with the circuit below. I have attempted to reduce the circuit below into the following circuit, but I am unsure if this is correct. Can anyone confirm that I ...
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### How to compute Rth for this circuit using OrCAD PSpice

Take a look at this circuit The question asks to find Rth and Vth between a-b terminals. Hand calculation yields Rth=3.857 and Vth=4V. With OrCAD, the result is shown below using Bias Point ...
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### Thevenin Equivalent Circuit of Ideal Independent Current Source

This is dual to <Norton Equivalent Circuit of Ideal Independent Voltage Source>. I have wrote it to answer a problem <click here> but I need to make it independent which requires ...
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### Norton Equivalent Circuit of Ideal Independent Voltage source

For some purpose I need to derive the equivalent Norton circuit of an ideal independent voltage source. I found that it is impossible to do it. I describe the way I found it below and need comments, ...
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### Applying Thevenin's theorem between 3 points

I'm studying about transistor polarisation and got confused by this application of Thevenin's theorem, can someone please explain why eT is between B and M and why Vcc stayed even though it's not ...
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### How to choose nodes for Thevenin equivalent circuit

I would like to know how do we choose the nodes for a Thevenin Equivalent Circuit. For example, in the voltage divider, we compute the Thevenin equivalent circuit between the nodes where we would ...
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### BJT voltage divider biasing and thevenin equivalent

I am studying BJTs and I came across this configuration. My book applies Thévenin equivalent to the base and I do not understand how it does that, it does not make sense as there is base current to ...
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### Help With Thevenin Resistance Problem

Ok so I'm really new to electrical engineering and I was wondering if someone could help me analyze this circuit using KVL and KCL node analysis. I'm not really sure as to how I can set the KVL and ...
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### Using Multisim to Measure Thevenin Resistance

Using probes, it is easy to find the Thevenin voltage, and Norton Current of a circuit. We could simply divide Vth / In = Rth, but is there a way to find Rth through a simulation?
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### op-amp thevenin resistance calculation in pspice

hi everyone so my question is how do i calculate the equivalent we see from Vo node (output of op-amp) in pspice beacause anything i do i get 0 value it will be appriciated if one of you help me to do ...
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### Thevenin Equivalent of circuit

I have a circuit that looks like the following. It appears to be simple- What's the thevenin equivalent? I can't seem to simplify it as there are no common nodes that any of the resistors connect.
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### How Do You find The Cutoff Frequency of a Low Pass Filter?

A lowpass filter exists around R1,R2,R3 and C2 but how would you find the cutoff frequency? I think that you have to first find the Thevenin equivalent circuit and this is what i got: RTH = (R1//R3)//...
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### What circuit element must be removed to have the VTh equal to the voltage between two points using Thevenin's Theorem?

The question that I'm trying to understand is provided below: The Thevenin's equivalent of the circuit "around" 6 ohms has a VTh equal to the voltage between a & b, (a) With the 6 ohms ...
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### How to Find Thevenin's Voltage & Resistance?

I've a hard time understanding Thevenin's theorem. I know that it is just a theorem to simplify a complex circuit, and to easily analyse that. My hard understanding is in the mathematics of it. Given ...
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### Thevenin's theorem

So I watched a couple videos on Youtube about Thevenin's theorem and I found 2 ways to do this circuit,but I get two different answers and I'm confused now.(for finding $V_{th}$) First method is \...
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### Replace everything in the circuit except the 3 A source by its Thevenin equivalent circuit and use the result to find V1

Replace everything in the circuit except the 3 A source by its Thevenin equivalent circuit and use the result to find V1. This is my solution but the teacher said it is wrong and i do not know how to ...
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### Can anyone solve this diode circuit with Thevenin theorem, please?

The question says: Assuming that the diodes in the circuits of Fig. are ideal, utilize Thevenin's theorem to simplify the circuits and thus find the values of labeled currents and voltages. Update:...
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### How to find total voltage in a two loop circuit

I've been going through the DC Theory textbook by NJATC to learn basic electronics so I can better enjoy my guitar tinkering. But I also want to be able to repair or maybe even build effect pedals and ...
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### Why is the verification of Thevenin's theorem more accurate than that of Superposition theorem?

In my first course on Electrical Engineering, we have an experiment in the Electrical lab that asks us to verify the Thevenin theorem and the Superposition theorem and cross-check our results with our ...
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### Thevenin equivalent and maximum power transfer theorem question

I want to find a load resistance's value so that it gets the maximum power transfer, and thus I am using Thevenin's theorem by finding the equivalent circuit's resistance. By doing so, I got 2929.28 ...
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### Simplifying circuit for Thevenin's theorem

I am supposed to find a Thevenin's equivalent circuit for this one: I am struggling with simplifying it to calculate Rth. When I apply short circuit to voltage source I achieve a junction connected ...
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### LTSPICE Thvenin voltage

How can I read Thevenin voltage from such circuit in LTSPICE? I know how to get Thevenin resistance in LTSPICE. I calculated manually values that I expect to get from LTSPICE and indeed Thevenin ...
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### How to convert to polar form?

I'm still stuck on this task: And I'm trying to calculate Vth. I've calculated: And the Vth equation is: My problem now is that I want to convert from rectangular form to polar form for 100j/...
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### Is the Kirchhoff's Current Law correct?

I'm on this problem: And I'm trying to use KCL to find Vth, my approach is: Am I on the right path regarding KCL? Thanks in advance!
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### Simplifying a circuit using Thevenin

I need to find the Thevenin Resistance between A and B, I have the circuit shown below. My question here is: are R2 and R3 in series as well as R4 and R5? If so, can I then by grouping them ...
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### Thevenin Nodal analysis

Anyone has any idea how to deal with this tricky circuit using Thevenin?
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### How to use Thevenin's theorem in a circuit with more than one source?

Attempts thus far at the solution:
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### Thevenin Resistance query

I have an amplifier model circuit where I've determined the load (speaker) voltage (using its peak power output and its resistance) and measured the open-circuit voltage. How can I work out the ...
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### Thevenin tension on the following circuit

I've been trying to solve a circuit by aplying thevening (the following one) I've obtained 11,4V but I've seen to be wrong. Can anybody help me?
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### Why will i calculate the wrong current when i transform part of circuit to Thevenin circuit?

Here is the circuit in this question The original circuit is in the left hand side,as we can see,there are two norton circuits in it,so i transform them to the thevenin equivalent circuit,just like ...
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### Find the Thevenin's equivalent of a circuit between nodes A and B

My class had come to discuss the Thevenin's theorem and we stumbled upon this particular problem which quite confuses me in a way that what I found is different than what my lecturer taught us. So, ...
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### Thévenin with dependent source and unknowns?

I have this problem where I need to find the Thévenin resistance. However I have a bit of a trouble of thinking how I should do it with a dependent source and that everything is unknown. How should I ...
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### Circuit with dependent & independent voltage sources - Why not matching?

I've just solved this exercise by hand and then I have compared the results with PSIM Simulator and there's a difference of e-006 in the Voltage Vo. I just can't understand where's the mistake, I have ...
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### How to calculate maximum power when value of load resistance is unknown?

Once again same circuit and same voltage source / current source and resistances. However now I need to calculate the maximum power that is consumed by the RL. How do I do that, and most importantly ...
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### How do I calculate load resistance?

I'm here with yet another problem. This time I can't figure out what the question wants. I've calculated the Thévenin equivalent, however I can't work out how I should calculate the RL. Is the load ...