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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Solving a circuit using Thevenin's theorem and superposition

I have the following circuit in an example problem from a book, where it shows you how to find the Rth and the Vth. The Vth has to be found via superposition. The Rth solution is Rth = 103/77R, which ...
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Method of superposition

I need help solving this task, if anyone had a similiar problem it would help me. The task is: Determine the power dependence for an electrical circuit current through the receiver Rp in relation to ...
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I get different results whenever I try to solve this circuit problem with superposition theorem. Can you please help?

My recent results are like this: i= 11,174 the current exiting from Vg= 3,304 V=53,1 I am doing something very wrong but I can't see it. My values even don't correct each other. Another thing is if I ...
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41 views

Find the Norton equivalent of circuit using superposition

Exercise 3.23a of Kaufman, 2005: Find the Norton equivalent of the circuit in Figure 3.125: I've run into some trouble when answering this question. The Norton equivalent resistance is clearly \$R_N=...
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Is my current flow annotations correct?

I have this circuit given and we're asked to get the contribution of the 75V source to iR using superposition. The yellow and red line in the picture are my assumed current flow. However, I couldn't ...
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Superposition theorem problem

The task is to calculate i here, and the answer is 0.5A (specifically -0.5 due to its direction) but I have no idea how to get that. I've tried separate calculations of the circuit with only 1 voltage ...
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36 views

Validity of superposition when summing powers from each harmonic

In Boylestad's Introductory Circuit Analysis 13th edition page 1176, there's an example about working out the total power dissipated by a circuit fed a nonsinusoidal signal. The signal is decomposed ...
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63 views

How can adding a reflector to a half-wave dipole (in a Yagi Uda antenna) increase the gain by more than 3dB?

I have been designing a Yagi Uda antenna using CST Microwave Studio. For a half-wave dipole the directivity (at 1.3GHz) was 2.116dBi. After I added a Reflector, the directivity improved to 6.074dBi. ...
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How do you do superposition to find value of voltage source [closed]

I know when you are using superposition you have to find the contribution of each independent source. You do this by turning voltage sources to short circuit and current sources to open circuit. then ...
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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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252 views

Is superposition theorem the only method to calculate the \$I_0\$ in this circuit?

When I learned the superposition theorem, the book provided this circuit to me, and taught me how to use the superposition theorem to find the value of \$I_0\$: simulate this circuit – ...
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657 views

How do I get v0 using superposition in this circuit?

I'm trying to get the value of \$V_o\$ in this circuit. Here's the circuit: Using Superposition theorem: So first, we remove the voltage source and replace it with a short circuit. Then we calculate ...
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147 views

Superposition principle and op-amp

I was trying to answer these questions (picture below) but I am not sure if I did a good job. The way that I solved it is shown on this picture below: At the inverting part of the op-amp where the ...
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How to do i solve this electrical circuit? [closed]

I've been trying to solve this circuit with two current sources: Following is given: ia = 1mA, ib = 2mA R1 = 1K, R2 = 0.5K, R3 = 2.2K, R = 4.7K Personally I've been trying to use KCL to determine ...
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264 views

Substitution + Superposition with RLC circuits

Consider the following circuit: simulate this circuit – Schematic created using CircuitLab \$E\$ is a constant voltage source. The switch is closed at time \$t = 0\$. The request is to ...
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158 views

finding missing current and voltage in a circuit involving superposition

We are given a black box that contains only linear circuit elements and a pair of ports. We conduct the following two experiments with this black box. With the right port open, we applied V1 = 2V to ...
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Superposition principle and voltage division

I am looking at some circuit solving using the superposition principle and I came across this one. We need to find \$v_0\$. My thought would be to use superposition and voltage division in the ...
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54 views

Superposition principle with current divider

Can somebody explain to me how can I use a current divider in a linear circuit with two current sources? I understand that the given source is linear, so we need to apply the superposition principle. ...
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116 views

Is there a paradox in the superposition principle?

I came across this problem for the first time when I started thinking about the clever circuit of Howland current source (see What is the brilliant idea behind the Howland current source?). Let me ...
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862 views

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, ...
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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. ...
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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 ...
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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 ...
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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 ...
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answer verification for Superposition question

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

Superposition with dependent sources

If the value of a dependent source (say CCCS) depends on the value of an independent source (say a current source). When setting the current source to 0, would that make the CCCS an open circuit (i.e. ...
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159 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 ...
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458 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 ...
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87 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 at ...
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128 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 ...
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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'...
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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 ...
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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 ...
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121 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 ...
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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 ...
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927 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 ...
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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?
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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 ...
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96 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 ...
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Use of superposition principle for the inverting amplifier

My current understanding of the inverting amplifier goes as far as assuming the second golden rule: no current flows through the OpAmp. From here on, up to the end result of \$ H(\omega) = -\frac{R_2}...
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Finding a current through a short circuit (Thevenin)

I am working through a question that involves superposition. I have attached a picture of the question I am working through. I am having difficulty doing question e) and f). I was hoping you someone ...
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506 views

Two Op-Amp Instrumentation Amplifier - Gain derivation

I came across the following appnote(slyt647) which analyses the two op-amp instrumentation amplifier topology. The gain was found by finding individual gains for each op-amp and adding them in ...
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70 views

Question about voltage in the open circuit

I have this circuit here, and I'm trying to its Thevenin equivalent voltage and resistance, using superposition. When I "kill" the \$V_{0}\$ source, it becomes a wire and the voltage across the gap is ...
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210 views

Unable to verify Superposition Principle via Matlab

I am dealing with this problem where I want to verify the Superposition Principle via Matlab. I have a DC source of 100V, an AC source of 50V, 60Hz and three resistances, R1=10 ohms, R2=20 ohms and ...
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280 views

Solving all-pass using superposition

I was reading this document talking about the use of superposition with dependant sources. At example 14 they state the following : I don't understand how they pulled the equation for Vo by ...
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RF mixer theory and short circuits

Suppose I have the following RF mixer circuit- How does placing two AC voltages of differing magnitude and frequency directly in contact with one another not create a short circuit condition in a ...
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Find the value of U by the means of superposition

I want to do that by superposition rule. Firstly i need to short the E source and compute U0 in case of current divider formula? So i will get u1 which is voltage loss when the voltage source is ...