All Questions
Tagged with resistance thevenin
51
questions
0
votes
3
answers
80
views
How to find current for Thevenin equivalent circuit
I'm trying to figure out how to calculate the Thevenin equivalent circuit for a voltage divider like the following one:
I understand that V_th is obtained by opening the terminals of the output, so ...
- 87
1
vote
1
answer
41
views
How to find Thévenin voltage with dependent voltage source
I am not an electrical engineer, so I lack fundamentals. I was trying to solve for the Thévenin voltage, that is Vout at the open terminals A and B, but what makes it significantly difficult for me is ...
- 11
0
votes
1
answer
154
views
I don't get what I am doing wrong with this Thévenin question [closed]
I understand that the Thévenin voltage is zero because there are only dependent sources, but finding the Thévenin resistance doesn't seem to work.
My work for finding the Thévenin resistance is below. ...
- 37
-1
votes
1
answer
72
views
Should resistance between a and b terminals be considered when computing Thévenin-equivalent resistance?
When attempting to find the Thévenin-equivalent circuit to the left of terminals a and b in the image below, should one consider the 4.7 kΩ resistor? Why or why not?
When taking the 4.7 kΩ resistor ...
- 1
0
votes
3
answers
121
views
How can I maximize the power consumed in this resistor?
simulate this circuit – Schematic created using CircuitLab
I have gotten really stuck on this question. The question is:
Determine R3 so that maximum power is consumed in R3.
What is that ...
0
votes
2
answers
248
views
Limitation of the Thevenin's equivalent circuit
simulate this circuit – Schematic created using CircuitLab
Thevenin's theorem independently derived in 1853 by the German scientist Hermann von Helmholtz and in 1883 by Léon Charles Thévenin (...
- 206
0
votes
2
answers
84
views
Thevenin's resistance with a dependant source
I have this circuit for which we must find the Thevenin resistance in considering the load is \$R_L\$. For this case I calculated \$E_{th}=-\beta i_b R_4\$ by shorting the load resistor \$R_L\$ so the ...
- 27
0
votes
1
answer
244
views
Equivalent resistance vs Thévenin resistance
What is the difference between equivalent resistance and Thévenin resistance?
- 11
0
votes
2
answers
386
views
How to get R_THEVENIN in Wheatstone bridge?
In the simplification of a Wheatstone bridge with Thevenin's theorem when we calculate the RThevenin as in the schematic. How to explain in another way that the resistor R1 and R3 are in parallel and ...
- 27
-1
votes
3
answers
2k
views
How can I better understand Thevenin resistance?
On the internet, it is mentioned that Thevenin's Theorem states that "Any linear circuit containing several voltages and resistances can be replaced by just one single voltage in series with a ...
- 11
-2
votes
3
answers
2k
views
Thevenin equivalent resistance of a complex circuit
I have a complex circuit. I have found the thevenin equivalent voltage V_t, by making two equations. Its V_t=3.877 V
Now I have to find the thevenin quivalent resistance. I was thinking of short ...
user296330
1
vote
2
answers
428
views
Why do we treat R1 and R2 as though they're parallel in this circuit?
I'm working on a homework problem and I need to solve for the base current Ib, and I know to do that I need to find the Thevenin equivalent at the transistor base. My professor solves for it as though ...
- 25
0
votes
2
answers
625
views
What would be the Open Circuit Voltage and Thevenin Resistance in this Circuit?
I am hoping someone can help me understand Open Circuit voltage and Thevenin Resistance.
To test my understanding I created the attached circuit and ran a transient analysis using LTSpice.
With a ...
- 65
0
votes
0
answers
80
views
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 ...
- 1
0
votes
3
answers
6k
views
how to find Thevenin Equivalent Voltage and Thevenin Equivalent Resistance?
pls help me solve this question it’s confusing me
- 11
0
votes
1
answer
468
views
How can I find the equivalent resistance of this circuit?
I'm trying to find the Norton Equivalent circuit using Norton's Theorem for the circuit below. Since I need to find the Norton Resistance, I removed all the sources from the circuit. The problem is, I ...
- 173
0
votes
3
answers
2k
views
Is resistance the derivative dV/dI or the ratio V/I?
I'm trying to understand the justification for turning off independent sources when calculating the equivalent resistance in Thévenin's theorem.
This answer explains has a good explanation but it ...
- 103
0
votes
1
answer
163
views
Applying Thevenin's theorem between 3 points
I'm studying about transistor polarisation and got confused by this application of Thevenin's theorem, can someone please explain why eT is between B and M and why Vcc stayed even though it's not ...
- 3
0
votes
1
answer
44
views
Thevenin Resistance query
I have an amplifier model circuit where I've determined the load (speaker) voltage (using its peak power output and its resistance) and measured the open-circuit voltage.
How can I work out the ...
- 23
1
vote
1
answer
97
views
Idea behind Thevenin equivalent circuit
As i know, we find a thevenin equivalent resistance by finding open-circuit voltage and short-circuit current and then divide these two. I have looked on wikipedia and other sources but could not find ...
- 271
0
votes
1
answer
2k
views
How do I calculate load resistance?
I'm here with yet another problem. This time I can't figure out what the question wants. I've calculated the Thévenin equivalent, however I can't work out how I should calculate the RL.
Is the load ...
- 423
0
votes
2
answers
4k
views
Getting Thévenin equivalent when there's a current source only
I am stuck finding the Thévenin voltage in this circuit.
What I did first is remove the current source and replace it with an open circuit. After that I got the Thévenin resistance which is the ...
- 79
1
vote
1
answer
404
views
How do I apply Thevenin theorem in this problem?
Can't find the answer to this question. Am I supposed to get the voltage in the 4 kilo ohm resistor? Really appreciate it if anyone can solve this one! Here's the circuit:
- 79
0
votes
0
answers
48
views
Redrawing a wye circuit
Instead of using wye delta transformation I tried redrawing the following circuit but I do not understand where I made a mistake. The circuit appears to have the same voltage current relationships at ...
- 141
0
votes
1
answer
94
views
For the network shown in the figure, draw the corresponding Thévenin equivalent circuit and establish its parameters VT and RT
I can't find any examples online similar to this format, please help!
Attempt: RT = (2*5)/(2+5) = 10/7 = 1.429 k-ohms
VT = 8V + 8V = 16 V
Do you ignore the center resistor and just add the voltages ...
- 9
0
votes
2
answers
2k
views
Finding the Thevenin equivalent Resistance for circuit with voltage-dependent sources
A linear circuit containing two voltage dependent sources, as shown. The elements in this circuit have the following values: \$R_1 = 7.2k\$ Ohms, \$R_2 = 12k\$ Ohms, \$R_3 = 3.3k\$ Ohms, \$\alpha = 0....
- 121
0
votes
1
answer
82
views
Trouble understanding thevenin's model from AoE Lab
I am using the AoE lab book to teach myself electronics. I am on the voltage divider section, and I am confused at their simplified explanation. I'd like to explain it a different way, but I am not ...
- 209
0
votes
2
answers
637
views
Confused about Thevenin’s Theorem
I have a hard time trying to understand why Thevenin’s Theorem is the way it is.
As per the diagram below, I understand why we take our “Thevenin resistance” that way. But as far as the voltage is ...
2
votes
2
answers
6k
views
LTspice XVII solving Thevenin Resistance basics
Thevenin voltage is a snap, but how do I get R Thevenin?
- 135
0
votes
1
answer
633
views
Thevenin Voltage and Resistance Problem
Please help me with this problem I have been set.
So, I have successfully used Kirchhoff's Voltage law to determine the voltages and currents across each of the resistors in question (R2 and R3). ...
user217971
1
vote
1
answer
42
views
Conceptual Question About Hemholtz-Thévenin Theorem
I've been taught that for the Hemholtz-Thévenin's method I need to add an independent voltage source with a current flowing and at the same time "turn off" independent sources of voltage and current ...
- 143
1
vote
1
answer
72
views
How do I find the Thevenin voltage and resistance equations of this circuit?
How do I find the Thevenin voltage and resistance equations of this circuit, with respect to the terminals U and G when Rc, Vc, Rt, and Rtrans are given?
- 135
0
votes
1
answer
42
views
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).
user199242
0
votes
2
answers
2k
views
Can a Dependent source be dependent on itself?
I am looking for the Thevenin Resistance here. However, I have no clue what to do with \$i_b\$ and the source dependent on it.
This is the entire circuit.
\$i_b\$ is the current through the 5\$k\...
- 1
0
votes
3
answers
2k
views
Thevenin Equivalent Resistance of complex circuit
I'm trying to find the Thevenin equivalent of a circuit of which I have already found the Thevenin voltage. Unfortunately I can't figure out how these series parallel combinations work to find the ...
0
votes
1
answer
2k
views
Thevenin resistance for bridge circuit
So I've been at this question for a few hours now and i can't seem to get the final answer for a). I know how to find the the resistance of a basic Wheatstone bridge, but i don't know how to find the ...
- 3
0
votes
2
answers
126
views
Thevenin Voltage and Resistance Calculations
In order to calculate R_th, you have to made all voltage and current sources equal to 0 (creating open circuits at current sources and shorts at voltage sources), so you will wind up with only ...
- 71
-3
votes
2
answers
2k
views
Calculate Vth in thevenin's circuit [duplicate]
I want to calculate Vo by Thevenin's theorem. First I removed the RL(1k)
Now I have to calculate Vth. Can I say that Vth is 6V? or Vth=6V + voltage through 2k?
If both these options are wrong, then ...
- 13
2
votes
1
answer
2k
views
Condition for negative Thevenin resistance
Is there any particular condition or relation between the impedances and the dependent sources in a circuit by which the Thevenin resistance turns out to be negative?
- 207
2
votes
3
answers
7k
views
Calculate the thevenin resistance with diagonal resistors
The question is:
Replace the circuit with a Thevenin Equivalent Circuit and find the Thevenin Resistance (Rt) in ohms and find the current in R3.
I've used Thevenin before and solved quite a few ...
- 21
-1
votes
2
answers
2k
views
Calculate using Thevenin's theorem [closed]
How can i get the Vth and Rth on R6 using Thevenin's theorem in this circuit? I have no idea how to do this.
- 1
2
votes
1
answer
54
views
AC analysis: finding L and R
EDIT: there should be arg[I2] instead of arg[I3]
I've tried to replace V1, C1, R1 with Thevenin equivalent, but I've lost in my calculations. Is there any better approach?
- 35
1
vote
1
answer
430
views
Finding the Thevenin equivalent resistance in given circuit
I tried finding the equivalent resistance (between the nodes A&B) for the given circuit, however I can't seem to get it right:
simulate this circuit – Schematic created using CircuitLab
...
user97306
0
votes
1
answer
692
views
How to find thevenin resistance of a capacitor in an op amp circuit?
for the following circuit could someone explain how to find the thevenin resistance across the capacitor? Most answers use the 10K resistance in parallel as the thevenin resistance but I don't ...
2
votes
1
answer
123
views
Thevenin's Resistance
I can't understand why the answer is like in the picture and not R = [ ( 4 + 6 ) // 8 ] + 2.
Isn't 4 in series with 6 and parallel to 8 ?
- 23
1
vote
1
answer
205
views
Finding the Thevenin equivalent circuit for the following one
From my poor drawing , it's obvious that the resistance between A and B terminal is just
$$((((((100 || 100)+30) ||80)+20)||60)+20) = 50\Omega$$
But I am getting confused about determining the ...
- 113
0
votes
1
answer
89
views
Is there a way to find this resistance? [duplicate]
I have done thevenin analysis on a larger circuit and have gotten the result below. I need to find the value of RL.
Would I use thevenin again? But that would give me the same result because I would ...
- 235
-1
votes
2
answers
3k
views
Thevenin's equivalent of Wheatstone bridge
I tried to calculate the Vos and Isc and both of them are zero..so the Thevenin's resistance is 0/0=undefined. How do I calculate the resistance when Vos/Isc fails,such like the Wheatstone bridge?...
1
vote
2
answers
2k
views
Confusing Parallel/Series Arrangements in Application of Thévenin's Theorem
I'm learning from Paul Scherz's Practical Electronics for Inventors (2nd ed.) and I've become confused at what was I thought I was comfortable with: namely parallel and series resistors. The offending ...
- 113
0
votes
2
answers
1k
views
What is the difference between the substitution principle and Thevenin theorem?
The substitution principle (as seen in this book; in italian, sorry)
Let A and B be any two part of an electrical network with voltage and current sources and only resistances, connected by
...
- 103