# What is Thevenin: Definition and 318 Discussions

Thévenin is a surname. Notable people with the surname include:

Charles Thévenin (1764–1838), neoclassical French painter
Denis Thévenin, birth name of French author Georges Duhamel
Léon Charles Thévenin (1857–1926), French engineer
Nicolas Thévenin (born 1958), bishop and Vatican diplomat
Olivier Thévenin (born 1968), French racing driver

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1. ### Calculate voltage over capacitor and resistance

Hi! I tried by using the Thevenin. Later using Vth and Rth to calculate Vs(0.1ms). After that I divided the voltage from E over R1 and R3. The circuit and my attempt:
2. ### Engineering Thevenin Generator: Maximum Active Power & Calculation

So I have calculated Zab which is 3-3j (it's correct). Now I have to calculate (Uab)0. This is where I just get completely lost. In my opinion: (Uab)0=E3+I3*R3+Ic1*Xc1+E4 Note: I recognize these currents are not shown in the picture, but based on their indexes and basic logic I hope you...
3. ### Thévenin and Norton circuits Exercise

Figure: My attempt at a solution: a) ##\boxed{V_{TH}}## Current source equations ##\rightarrow \boxed{2=I_2-I_1}## Control variable equations ##\rightarrow V_1=4I_2\rightarrow \boxed{0=4I_2-V_1}## Super Mesh ##\rightarrow -0,5V_1+2I_1+I_2(4+8)-8I_3=0\rghtarrow...
4. ### Are Overly Complicated Homework Problems Beneficial for Student Learning?

Hello I'm trying to solve my homework assignment, I have successfully found the thevenin resistance which is equal to 3.75 but I'm stuck on how to even get started to find the voltage because there are too many components. I have shorted the load resistor which is called RL but there are too...
5. ### Formal proof of Thevenin theorem

Hi, I am looking for a formal proof of Thevenin theorem. Actually the first point to clarify is why any linear network seen from a port is equivalent to a linear bipole. In other words look at the following picture: each of the two parts are networks of bipoles themselves. Why the part 1 -- as...
6. ### Differential Amplifier Common Mode Thevenin Equivalent

I am currently reading about small signal analysis of a MOSFET differential amplifier. The text I am using has the below two figures for a common-mode equivalent circuit for the amplifier. The first makes sense to me except where it calls it a "Norton equivalent circuit", whereas I thought a...
7. ### Engineering How to Calculate Thevenin Equivalent Circuit

First, I calculate the Thevenin resistance by treating the independent current source I0 as an open circuit and noticing that the resistance of the dependent voltage source is α (since V=IR and the voltage across the dependent voltage source is given by αi. In this way, I have: RTH = 1 / (1 /...
8. ### Calculate the voltage across a resistor using Thevenin's Theorem

I'm thinking I should apply Thevenin's Theorem to find the voltage, but I need to find I_D in order to be able to calculate U_S.
9. ### How Is Thevenin Resistance Calculated in R1 Parallel to R2 Configuration?

The attached image (Horowitz & Hill Student Manual for 2nd ed) gives thevenin resistance and voltage for the network R_1+(R_2||R_L) as R_th=R_1||R_2 E_th=E_in(R1/(R_1+R_2)) E_th is self-evident (voltage divider) but how in the world they get R_th i beyond me. If there is no load, isn't R_1 in...
10. ### Engineering Find Current Through 40 Ohms Resistor Using Thevenin

Find the current through the 40ohms resistor using the Thevenin? I have calculated the Zth = 10 ohms. And I couldn't find the Vth.

38. ### Computation of Thevenin Equivalent

Hello! Recently I was going through some old exams and upon encountering this problem (which seemed pretty easy) I got stuck. Exams at my university are composed of individual tasks, each having three subquestions with four plausible answers respectively. Solution sheet gives results only, so...
39. ### How can I determine Rth in Thevenin with a transconductance source?

This is the question First,I use thevenin theorem,when I close the voltage source, i apply nodal analysis to find rth,is my answer correct?
40. ### Engineering Finding Current in a Thevenin Circuit

Homework Statement Given a circuit with a total of 3 sources , 2 Voltage sources and 2 Current sources and 4 resostors, Find the Cirrent I2 passing through the branch where R2 and V2 are. And I am asked to give the formula for the value of the voltage in the current source. Attached the...
41. ### Thevenin equivalent diamonda shaped

【Mod Note: thread moved from technical forum, so homework template is missing】 Hi every one! I am encountering difficulties on finding the Req. in the sense that i can't really see which is in parallel end which is not, especially on the diamond shape. I haven't really understood how to treat...
42. ### Engineering Converting to a circuit's Thevenin equivalent?

Homework Statement Homework Equations Finding the Thevenin equivalent? The Attempt at a Solution I found the thevenin resistance to be 185/47 ohms, which came out to be correct. I've been struggling with this question all day. I ended up attempting to find the norton equivalent and then...
43. ### Engineering Finding Thevenin Equivalent Circuit for a Complex Network

Homework Statement Homework Equations Thevenin Equivalents V = IR The Attempt at a Solution To try to find R_th, I replaced all the voltages with short circuits but I do not what to do next. Then I believe V_th would just be the same as the voltage of the rightmost resistor.
44. ### Thevenin resistance in an opamp RC circuit

Homework Statement In the figure given what is the Thevenin resistance between the nodes of the capacitor?? Homework Equations The Thevenin resistance is the open node resistance between two points. The Attempt at a Solution The way I see it, R2, Rf and R1 are in series and that combination...
45. ### What is the Thevenin and Norton equivalent for the given circuit in Fig. 4.125?

Homework Statement Determine the Thevenin and Norton equivalents at terminals a-b of the circuit in Fig. 4.125. The figure is uploaded. Homework Equations We know that the Thevenin resistance is the resistance between the terminals when the independent sources are turned off. The Attempt at a...
46. ### Engineering Solving circuit with Thevenin's theorem

Hey guys, I am supposed to solve for voltage and current on R4 using Thevenin's theorem here. Values are following: U = 100V R1 = 310 R2 = 610 R3 = 220 R4 = 570 R5 = 200 Now, I know I need to solve for Rth and Vth, so I put the circuit into simulation and figured out voltage on R3 is equal to...
47. ### Engineering Phase relationships in Thévenin circuit

Homework Statement 2. Homework Equations 3. The Attempt at a Solution [/B] For part (c), should the phasor diagram just have everything on a straight line, save for the Rt and Vrt? Honestly not sure how to attempt part (d) as we never really covered phase relationships in lectures, just...
48. ### Engineering Finding Thevenin Equivalent Voltage for a Circuit with Multiple Voltage Sources

Homework Statement See attached image Homework Equations Thevenin EquivalentThe Attempt at a Solution a) Find the total resistance between A and B by short circuiting the voltage sources: Rt = 100Ω in parallel with the two 150Ω Two 150Ω in series: R = 300Ω 1/Rt = 1/100 + 1/300 Rt = 75Ω I...
49. ### Thevenin reduction of network for fault analysis trouble.

Homework Statement Reduction from top network to bottom network in the screen shot. I can not find the steps that have been taken to do this. Fault impedance = Zfa = Zfb = Zfc = j0.5 Homework EquationsThe Attempt at a Solution in hand written screenshot, sorry for the mess, just to show it...
50. ### Fault analysis -- Simplifying to Thevenin equivalent

Homework Statement [/B] All voltages and impedances are in per unit values. After all the source transformations, why is the voltage source still 1 ? Homework EquationsThe Attempt at a Solution [/B]