Questions tagged [superposition]

The superposition theorem states that the output of a linear circuit composed of multiple independent sources is the algebraic sum of the outputs due to each independent source alone. Use this tag for questions about circuit analysis using the superposition theorem.

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Kirchhoff’s Law and Superposition Theorem

For the given circuit I found the current and the voltage at R1, R2, R3, using the superposition theorem. 1.I replaced the VS2 with a short then calculated: I1= 0.57mA, I2=0.33mA, I3=0.2mA, V1= 2.68V, ...
30 views

How to solve circuit using superposition, thevenin, norton… etc

I want to solve this question, but i am beginner at circuit... So i don't understand when I have to use superposition, thevenin, norton.... because those are so confused..... (i am so sad...) Maybe ...
40 views

Total Dissipated Power

Please help look into to the below question where total dissipated power is to be calculated. In the solution given in the text they have added the under root of the power and then squared the result. ...
28 views

Superposition theorem with phasors [duplicate]

Can someone explain the superposition theorem step by step when applied with phasors (AC circuits)? I think books and websites mostly include examples of how to solve something with superposition but ...
61 views

Simple questions about current flow and superposition

So I was doing this exercise to prepare (not homework, school hasn't even started yet), and I think I got the math and the logic right, but there are a few things that I didn't understand, and since ...
84 views

How to solve this task that relates to method of superposition

The task looks quite simple it says: Find the current that ammeter shows. $R = X_c = 10 Ω$ $X_L = 20 Ω$ The picture of circuit: I tried to solve it using method of superposition: In ...
60 views

answer verification for Superposition question

I am trying to solve the superposition question, but unsure of the answer. If possible, please help.
91 views

Thevenin's Theorem: Why is there a $R_{th}$

Consider a linear mess present inside the box, simulate this circuit – Schematic created using CircuitLab If there's a voltage drop $v$ across the load, then why cant we simply replace the ...
142 views

Why is the frequency of the response same as that of the forcing function in a linear circuit?

Why is the frequency of the response same as that of the forcing function in a linear circuit? What's the case when the circuit isn't linear?
79 views

Superposition with dependent sources

If the value of a dependent source (say CCCC) depend on the value of an independent source (say a current source). When setting the current source to 0, would that make the CCCC an open circuit (i.e. ...
125 views

Thevenin's theorem equivalent circuit

I had an homework to do for school. One of the questions of this homework was to find the equivalent of a circuit using Thevenin's theorem. Unfortunately, my teacher told me that I didn't get the ...
197 views

Intuition on Thevenin's Theorem

In the following lecture by Prof. Anant Agarwal at 36:00, he intuitively proves Thevenin's Theorem using the following circuit simulate this circuit – Schematic created using CircuitLab If ...
77 views

Why superposition theorem has not been executed here?

Here is the given circuit In this problem while finding V1 we didn’t took the voltage contribution at that point by Vo(Superposition theorem)Only current source Is has been used to find the voltage ...
77 views

Under which specific (formal) conditions can I apply the superposition theorem?

Superposition theorem fails when you have two ideal (identical) voltage sources in parallel. Under which specific constraints can I apply it? I have read that, in DC Circuits, superposition requires ...
106 views

Differential amplifier, superposition theorem, output derivation, what is a loop here?

So based on this article, when V1 is removed/grounded, in this picture. Is the loop number 1 drawn correctly? Or does R3 and R4 both belong to the same loop? I'm not sure how Vout2 was calculated. It'...
27 views

What is the effect of the signals in output terminal?

I'm using superposition to solve this problem. I already know that for U1 the output is Ua1=-R/R. Unfortunately I'm not sure what is the output for U2 and U3.
68 views

How to find the current in this circuit?

Please help me find the current flow in A1,A2 and A3. its my First FEE class and I was able to solve this with voltage source but with current source Iam Having trouble. also V1 and V3 are the ...
82 views

Decomposing a waveform in LTspice to view only the transient component

In electric-circuit theory due to superposition for an LTI system, the voltage can be thought such that it is sum of of a transient response plus a steady state response. For example below the ...
92 views

How to solve a circuit network involving a resistor parallel to a voltage source using only nodal analysis?

I have been stuck on this for the past week and this week i just dont seem to find out what am i doing wrong. Please help me spot my mistake. Here you can find My circuit on multisim. Please provide ...
257 views

How to find v through superposition theorem in the following ciruit

What is the voltage V of the attached circuit? Using super position theorem. When i active the 9V source & short 12 V source is the current follows in 20 ohms, 10 ohms. & 4 ohms? Or it only ...
250 views

Voltage Difference in Superposition Theorem

I have to find voltage across R5 using superposition theorem but the problem is that I have a voltage difference of 4.16V, Solution:- Shorting battery VS1 R34 =8/3Ω =2.67Ω (Solved R3 & R4 in ...
39 views

Source transformation violation

Using thevenins or norton theorem, we can easily find current through the resistor as 1 amps. But if we convert the current source to voltage source , current turns out to be zero amps . Why?
102 views

Ultra simple circuit (2 Resistor, 1 Voltage, 1 Current): Kirchhoffs Laws don't give the solution; Superposition, but how?

I am doing a course on Coursera "Intro to electronics" as electronics always was my weak point. Now we discuss npn transistors and I have simplified circuit diagram (see below) where I am supposed ...
62 views

Skin effect with superimposed frequencies

Does a high-frequency signal affect the skin depth of another low-frequency signal? E.g.: On a solid 6mm2 copper conductor, there are three currents running through it at the same time: 15 A DC 15 A ...
93 views

Equivalent resistance after using superposition method

Hello I am trying to find the Voltage (U in the photo) using superposition method. And the first step is to compute the voltage given by the contribution of the left source of Voltage. Is this ...
1k views

101 views

Thevenin $V_{th}$ calculation problem

I'm back with my basic questions. I'm trying to answer some questions, using Thevenin, for this circuit: simulate this circuit – Schematic created using CircuitLab I must answer: $R_{th}$ \...
221 views

Superposition problem with $\Delta$-Y conversion

I'm trying to use superposition to solve the following linear circuit: Step I step I considered each active component as: But results are always wrong. Same procedure on many other circuits give me ...
91 views

Thevenin network without resistance?

I'm trying to find the Thevenin equivalent network for the circuit below. But whenever I solve the equations, I always end up with V(t)=2V_a - 3i_s and can't get any expression showing V(t)~i(t) ...
450 views

Find current and VAB with Superposition Theorem

Struggling to solve the following circuit with superposition theorem... I know I need to examine the circuit with each battery in isolation but I am confused how to treat all the resistors as they ...
1k views

Why are dependent sources not disabled with the superposition principle?

I've been wondering this recently. My intuition says that a voltage drop across a dependent source is no different than any other circuit element whose response depends on the inputs of one of the ...
207 views

Superposition and average power dissipation

Unfortunately, I am having trouble getting started on the question above. How can one model the affect of a voltage source on a circuit without the knowledge of the resistor configuration inside the ...
1k views

Calculating current and voltage using superposition

I'm trying to calculate Vo and Io from the following circuit: I was using node analysis but I don't really know how that worked. A friend of me told me that I could better us superposition. I ...
340 views

Finding an unknown resistance with superposition

I've been given a problem in which I need to calculate the resistance of an unknown resister $R_2$ by using the superposition method. The only other info which I have is that $R_2$ needs to be ...
327 views

Use superposition to find voltage V1

I first open circuited the 50 mA source and used Ohm's law to find $V_1$ $$V_1= 20 ∠0° \frac{j50 \times (-j25+40)}{j25 +40}$$ but the answer is not correct. Also, how do I find $V_1$ when the 20 ...
95 views

Power Analysis for Non-sinusoidal excitations

For a series RLC circuit excited by a non-sinusoidal voltage expressed as any Fourier sum, we calculate the absorbed power using the formula: ΣVI $\cos \theta$ where $\theta$ represents the phase ...
802 views

Deriving Differential Mode Gain of an Op Amp

I have been looking all over for derivations of the expression for the differential mode gain of a simple single op-amp differential amplifier. One thing that I have found very interesting is that ...
266 views

Solve for the current in the following circuit using superposition

I understood why $i_1$ is equal to $V_1/(R_1\parallel R_2)$. But, I can't understand why $i_2$ became right that. Would anyone explain why $i_2$ is not $-V_2/(R_2\parallel R_3)$ (since I got ...