# 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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### Superposition in state space equation with multiple harmonics in the inputs

I have a question related to the superposition in state space equation. Suppose I have a state space equation below \frac{d}{dt}X = AX + B\begin{bmatrix} u_1(t)\\ u_2(t) \\ \end{...
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### (AC circuits) Why do I need to use the superposition theorem when dealing with two or more different sources with different frequencies?

Consider: I know that the elements would have different impedances under different frequencies, but I can’t really visualize it. Also, is there another way to analyze the circuit (other than ...
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### Apply superposition principle to compute current in the 2 Ω resistor

So in this question what I tried to do was first remove the 6A source and then try to apply the current divider rule according to which the current I = 24 x (4/12) = 8A and then remove the 24A source ...
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### What is wrong with this circuit analysis?

I have a super simple question about using superposition to solve this circuit and it looks like I am running into a misconception about why my analysis is wrong. I have attached a simple circuit with ...
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### How to do mesh analysis when 2 mesh are sharing the same voltage?

I was doing superposition theorem and trying new numericals and then I came across this problem..should I write "9 volts or 9(IsubA-IsubB)" in mesh 1?
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### Finding the contribution of a voltage source

So i am trying to find the contribution of the voltage source in the circuit shown across the 3 ohms resistor. Do I need to include the two 2 ohm resistors even though there is no path that starts at ...
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### Big confusion about the very fundamentals of circuit analysis

First, let's call IR3 the current flowing from A to B, IR4 the current flowing from B to C, IR5 the current flowing from C to (-V2). What's the proof that IR3>0, IR4>0 and IR5>0? I know this ...
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### Intuition behind the superposition theorem

Consider a circuit with only batteries and resistors. Suppose we choose a resistor at random. Then to find the amount of current through this resistor, we can do it by finding the contribution of each ...
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### Why does Andy aka's calculation work in this case?

This question is from a confusion from this thread. Assume that you have the opamp circuit shown below. Also assume that the opamp is ideal and you don't know the value of ...
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### Superposition Principle: Parallel Resistance in a current source

Good Day, I would like to ask a question regarding the superposition principle particularly when the current source is the only one active. The solution to this question is that when the current ...
80 views

### How to calculate the voltage drop in this case?

I started with the superposition principle. For Vcc, Ib is open circuit and Eg is shorted. I got that the voltage drop due to Vcc is 10000/3 V. For Ib, Eg is shorted as well as Vcc. Since Ib is dc ...
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### How do I find Vo in this circuit using superposition?

simulate this circuit – Schematic created using CircuitLab I have to find vo in this through superposition. I found the current using a test source of 1V like so: simulate this circuit By doing ...
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### Can someone give me some insight on how to simplify this problem?

It is hard for me to understand how to start solving this problem. Should I start using the superposition theorem? Can it be simplified before?
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### Trying to find voltage v across resistor

I can find the equivalent Thevenin resistance, but am unsure where to assume ground/how to do nodal analysis (what is the rule) when the current source is passing through the voltage source. When I do ...
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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 ...
1 vote
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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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### 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?
1 vote
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### 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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### 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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### 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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### 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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### 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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