Questions tagged [norton]

For questions about Norton's Theorem, which states that a linear network of impedances, voltage sources, and current sources can be replaced with an equivalent network composed of a current source in parallel with an impedance. Consider also using the "thevenin" tag for questions also involving its dual, Thévenin's theorem.

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How do I use Norton's Theorem to find the current in this resistor? [closed]

I've been trying to solve this question but it seems impossible
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3 answers
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If all the resistances inside a passive resistive network is multiplied by some factor, what will happen to the thevenin resistance?

Lets imagine an arbitrary passive resistive network, a black box. Let its Thevenin equivalent resistance across some terminals \$a,b\$ of the network be \$R_{th}\$ ohms. Now lets imagine another ...
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Thevenin and Norton Equivalent Question about Current Division

Hello, I am asked to find the Norton equivalent of this circuit. So I did the calculations with source transformation. I did all the steps right but I am sort of confused on the last step to get the ...
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For the sake of finding the thevenin and norton equivalent circuits, how do I calculate the Isc and Voc in this circuit?

I was taught to do it with a longer method which I understand, by moving the Va and Vb terminals up to the source and gradually moving further back while finding equivalent circuits. I want to do it ...
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Confusion with Norton's equivalent

I was trying to find Norton's equivalent for the following circuit from A to B: So I decided to start by using the fact that \$R_{th}=V_{OC}/I_{SC}\$, and found out that \$V_{OC}=0\$ so I decided to ...
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Can you help me understand this Node Analyzing Method in Thevenin Norton Circuits

This is the circuit, and the node method solution is: Where did 280 come from? why is there two Vt/60 ? Please help me
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Why there is voltage differences in this question and how can I add up resistors to complete voltage?

Can you just explain to me the logic of this question because I am a bit confused here. Why do we have a 120 volt and 30-volt value? My take out is this: there is a current flowing through 120-ohm ...
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Can you explain this solution to find Isource (Thevenin Norton)

I know it is current division method but how is it applied ?
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1 answer
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How to use nodal or mesh analysis with a current source?

This is my circuit: The task is to get \$V_0\$ using Norton's theorem. My problem here is how current sources work. I tried to use mesh analysis first, but didn't know how to. Then I tried to use ...
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1 vote
1 answer
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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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1 answer
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Why does a source transformation not work in this case?

Circuits 2 and 3 give 3.8 mA as the current through R1 [2k Ohm resistor]. However, why is it not possible to transform circuit 3 to circuit 1? what I did: I tried simulating circuits 2 and 3 below to ...
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396 views

Resistor in parallel with a short circuit. Will current flow through it?

I'm trying to find the Isc of this circuit seen by the capacitor at t > 0 so I could find the Rth and get the circuit's time constant. If I make the capacitor a short circuit, it will be in ...
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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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1 vote
2 answers
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LM359 Quartz Crystal Oscillator Schematic not working

I'm trying to design a Crystal Oscillator based on the LM359 chip and the schematic on the datasheet but it's not working. It does not do anything. What I'm doing wrong? I changed some components ...
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3 answers
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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 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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2 answers
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How would I solve for the Norton Current of this circuit?

How do I solve for the Norton Current of this circuit? The resistance is easy enough, but the box with the resistor and current source is tripping me up. How could I solve for that?
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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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1 vote
1 answer
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Norton Equivalent and current convention

Consider that we are trying to find the Norton equivalent of a certain circuit . According to my understanding , while finding the short circuit current or the Norton current , we should point it ...
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Thevenin equivalent with mutual inductance

I was practicing for the exam I found a problem in the book as follow : I want to find the voltage Vth so here is what I did : When finding the Vth I didn't ignore the dependant voltage source in ...
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How to use KCL or KVL to find the \$V_{AB}\$?

Find the \$V_{AB}\$ \$V_{AB}=(2\times 10)+(-10)+[(1 \times 5)+(1+2)\times 5]=25V\$ simulate this circuit – Schematic created using CircuitLab Now if i want to use KVL or KCL to calculate the \...
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how do we find the Norton equivalent circuit current of the both node ,a-b

Determine the Norton equivalent circuit current of the both node ,a-b, of 9 ohms resistors simulate this circuit – Schematic created using CircuitLab Solution: simulate this circuit \$V=RI=(...
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Why do we suppress the input when calculating the Norton/Thevenin resistance?

When we calculate the thevenin/norton resistance of a 1-port circuit, we suppress the independent inputs, be it voltage or current. But, my textbooks do not explain as to why we do this. So my ...
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5 votes
4 answers
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Norton op-amps advantages

I have been reading about Norton operational amplifiers, I got a good idea of how they work, even at the transistor level, I understand that difference current input = voltage output. What I have been ...
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Finding the current trough resistor in a closed mesh

In a closed mesh we have: simulate this circuit – Schematic created using CircuitLab The question is to determine the current through the 2nd resistor \$\text{I}_x\$. My work: I think of ...
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Solving Thevenin and Norton Circuit

simulate this circuit – Schematic created using CircuitLab How to solve this circuit for Thevenin and Norton circuit given RL in the circuit. My guess is to remove RL (open circuit). But I'm ...
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1 answer
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Thevenin equivalent of the following circuit

So...I have to find \$v0\$ using exclusively Thévenin/Norton equivalents. I am completely lost since in this case I have a dependent voltage source which relies on \$v0\$ itself. \$v1,a,R1,R2\$ and ...
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1 vote
1 answer
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Finding Norton voltage and resistance and max power

My directions for this problem are to find the power delivered when RL=3 and then find the maximum power. simulate this circuit – Schematic created using CircuitLab I found Rth = R1//R2 = 1 ...
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3 answers
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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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What is the Thevenin Norton equivalent of the folloing circuit

I am trying to find the Thevenin Norton equivalent of the folloing circuit. I am familiar with the procedure. However, when I am taking off the voltages to calculate the equivalent resistance, I am ...
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1 answer
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Calculating Short Circuit Current when Nortonizing a Circuit

My objective is to find v (voltage drop across 8 ohm) in the below circuit. I was able to thevenize the circuit successfully (V thevenin = 12 V and R thevenin = -2 ohm) and find v. But I find it ...
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How to apply Thevenin's Theorem to this circuit?

I have been trying to solve this question with either Thevenin's Theorem or Norton's Theorem but I got stuck at finding the Vth . Load Resistor is 5Ohm resistor in the middle . I have removed the ...
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2 votes
3 answers
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Norton <-> Thévenin equivalents with complex impedances

Given a Thévenin equivalent circuit, it's pretty easy to convert to the Norton equivalent, or vice versa: simulate this circuit – Schematic created using CircuitLab Although the value of the ...
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3 answers
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why would Ix would be 0?

Current coming out of the 5V source would never be 0 so what would make the current coming out of the 3v dependent source 0?
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1 vote
1 answer
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Understanding some mistakes, when trying to find the Thevenin equivalent

I was asked to find the Thevenin-Norton equivelant, and I got stuck on some things that I can't quite understand. I don't know if i need to be more specific. What's wrong with the following? And why ...
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2 answers
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Combining perfect voltage and current sources

I am attempting to reduce the circuit shown into a form of a single voltage source and resistance in series using Thevenin and Norton conversions. I approached the problem by first considering a ...
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2 votes
1 answer
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Norton's equivalent circuit with independent sources

I need to find the current flowing through \$R_{5}\$ by using Norton's theorem. What I tried to do was: Open-circuit the part of the circuit where there is \$R_{5}\$. Calculate \$R_{n}\$ by open-...
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2 votes
1 answer
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Calculate the Norton Resistance and Current and the Thevenin Voltage of the following circuit

U=10 V, R=10 ohm I calculated the resistance as such: 1/Rt = 1/R + 1/R <=> Rt = R/2 = 5 ohm To calculate the voltage I did KVL as such: U - 2Ur = 0 <=> Ur = 5V, where Ur is the voltage in the ...
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1 answer
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Finding the energy over the capacitor in DC

I tried using Thevenin to solve this and found Rth = 3 and Vth = 12 but this is way off the correct energy of the capactor (the energy is 4J).
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1 vote
1 answer
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Finding Thevenin equivalent circuit and using that circuit when terminals inside circuit

Sorry for the bad title, but I'm trying to get the Thevenin equivalent circuit and then use that circuit to calculate a current i. The problem I'm having is I'm not sure what to get the open circuit ...
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Norton equivalent resistance of zero?

I am trying to analyze this circuit using norton. Load (20 Ω) is connected between A and B. I have removed the load and calculated the norton current to be -2A. Now I try to calculate the norton ...
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Thévenin equivalent of a Norton equivalent

A very simple question. When solving circuits, and you need to solve it using the mesh analysis, you want the circuit to only have voltage generators.I wonder if for an independent current generator ...
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1 answer
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Do a Thevenin source and its equivalent Norton source always supply equal power?

Power supplied by a Thevenin source $$P_{Thevenin} = V_{Th}^2 \frac{1}{R_{Th}+R_L}$$ Power supplied by its equivalent Norton source $$\begin{eqnarray} P_{Norton} & = & I_N^2 \frac{R_{Th} ...
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1 answer
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Question with using Isc -> Any errors?

For the picture below, the answer for Voc is 7.5V, but when I add an Isc at terminals AB, and use KCL, I get Voc = 3.75V. Here are my steps/equations: (1) 15 = 4I1 - 2Isc (2) 0 = 3Isc - 2I1 I get ...
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2 answers
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Thevenin Norton Concept

For the below circuit, assuming I add a short circuit between terminals A and B (let's call it Isc), howcome I can't use a KVL equation for the left loop, along with the right loop (IsR1 - IscR2 = 0)?
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1 vote
1 answer
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Incremental Circuit Of This Amplifier

Can anyone explain to me the incremental equivalent circuit of this amplifier? the solution is this : I have some trouble understanding the resistor RB placement and also the Resistor R1 and R2.
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3 answers
802 views

Thevenin's equivalent

Rth = (10+10)||5+16=20 ohms. I think the Thevenin's equivalent voltage is across the 5 ohms resistor which was found to be 11.2 volts Applying nodal analysis but the answer is supposed to be -16.4 ...
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3 votes
1 answer
130 views

Norton equivalent with a single voltage source

I'm trying to find the Norton equivalent with respect to the load resistor RL for the DC circuit below. Each of the resistors have an equal resistance R. Removing the load resistor, I am having a ...
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Are there any cases that Source Transformation method can not be applied?

When I tried to use Source Transformation method on the 12 V voltage source the problem gave me a wrong answer. If I transformed the 2 A current source it works just fine. My question here, Is there ...
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