Circuit analysis Definition and 569 Threads

Homework Statement Me again. I again got confused with 2 similar things done differently on two different places. Let's say we have some arbitrary circuit and we want to replace a part of it with thevenin's generator. We also need to calculate effective Thevenin's resistance, which is where i...

Homework Statement We have the circuit in the figure.I have to find the current i using nodal analysis Homework Equations 1/6 F =-3j 1/2 F= -j 1/2 H= j The Attempt at a Solution So we have the equations Node V1 : [(7-V1)/(4-3j) ]=[ V1/3 ]+ [(V1-V)/-j] Node V : [(V1-V)/-j] =(V )+ (V/j) In...

Homework Statement Determine, using the values given in TABLE A, the current I in the circuit of FIGURE 2 by: (a) mesh analysis (b) nodal analysis. Any help verify for part (a)? And to help me get started with (b) as V3 is driving me nuts. Homework EquationsThe Attempt at a Solution For (a)...

Homework Statement We have the circuit in the figure.I have to find v using nodal analysis only. Homework Equations Converted 1/6 F to -3j and 2sin2t to -2j. The Attempt at a Solution In node v1 we have the equation 6= -12+ [v1/2] + [( v1-v)/1] In node v we have the equation 2j+ [(v1-v)/1]=...

Homework Statement You have a circuit (attached pic) and want to find the Thevenin equivalent resistance and voltage. Homework Equations See below The Attempt at a Solution OK< here's what confuses me. If I simply look at the total resistance of the circuit from A and B, it seems to me that...

Homework Statement 2. Homework Equations Resonant Frequency = 1 / [2 * pi * squareroot(LC)] Inductive Reactance = 2 * pi * f *L Capacitive Reactance = 1 / (2 * pi * f * C) Q = XL/Rw BW = fr/Q[/B] The Attempt at a Solution The information in the handy dandy jpeg I created is LITTERALLY all...

< Mentor Note -- Thread moved to Homework Help from EE forum > hi guys I am studying on diode circuit but i cannot really analyse a circuit with a diode. I understand that the question is asking minimum Vout so the current source input should be -2.5mA but i cannot go beyond that. Can anyone...

Homework Statement For an input potential (Vin ) which is a 1V (peak) sinusoidal source. Calculate V1 and Vout Homework Equations - The laws for an op-amp - NVM The Attempt at a Solution Here is my attempt not sure if correct.

Hello all! I'm confused about an explanation that my textbook gives, and I'm wondering if someone can help me understand it. The passage is as follows: A circuit consists of a 12 V battery with negligible internal resistance, in parallel with a charging unit with an emf of 15 V and internal...

Homework Statement Find the currents going through each resistor. Homework Equations V=IR The Attempt at a Solution [/B] I have the problem worked out and I can't find any errors in my work. The issue is that my professor has: I1=-.0843 I2=.086 I3=.0017 However my physics professor is...

Homework Statement Consider the circuit drawn below This diagram was the closest I could find online to the one equivalent to my question, but there are some adjustments I need to clarify. 1)Replace Rz, Rf, and Rin, to R1. 2)Also, in my question, there's an extra wire connecting Vout to the...

I'm having trouble determining what the values are on my Power Analysis diagrams. I get confused with active power, reactive power, and complex power. Can someone take a look at my attachment and tell me if I labeled the values correctly? I'm mainly curious as to if my Sg3 value is correct and...

[Moderator Note: Thread content restored from archive. Relevant portions of the original attachment have been uploaded and included here] Hello, I am working on a beginner level circuit analysis problem due tomorrow, but my branch current values aren't making sense. I've been struggling to...

Homework Statement [/B] http://imgur.com/Kq5e4Ka This is the circuit I need to find the Req for, the only things given are the Voltage of 7.1, and the resistance of each circuit. Homework Equations V=IR Kirchhoffs laws, the KVL and KCL.The Attempt at a Solution I have spent some time trying...

Homework Statement I need to work out the impedance of this notch filter, and what I really need is to know how to read the diagram, because if I can do that the rest isn't so hard. The diagram looks like this (I don't know if this uploaded right) So really, all I am trying to do is tell if...

Homework Statement Hi everyone! I'm trying to find the thevenin equivalent for part A of this circuit: http://imgur.com/4Jdg8w8 Homework EquationsThe Attempt at a Solution I first remove part B, that is, open circuit it entirely. Then I try to find Voc across the two terminals that are open. I...

Hi guys. Really elementary question here, I've been kicking myself for ages trying to figure this out, but I suppose everybody needs a little nudge sometimes. I have been staring at this circuit diagram: From this page...

Homework Statement See The attached Images. 2. The attempt at a solution The problem I am having with this is the following. I do not know where he is getting these equations from. We haven't done anything like this in class. Although he keeps mentioning skills we learned in previous...

Hi! Here is my task: OPAMP circuit and output voltag are shown in image below. Assuming that OPAMP is ideal, come up with a solution by hand. Then change capacitor's value from 200nF to 33nF and output voltage will be: Explain why output voltages are different ( first has triangle shape...

Hi! Here is my task: OPAMP circuit and output voltag are shown in image below. Assuming that OPAMP is ideal, come up with a solution by hand. Then change capacitor's value from 200nF to 33nF and output voltage will be: Explain why output voltages are different ( first has triangle...

I require a plenty set of questions on Circuit analysis for electrical engineering. Please suggest some source or book.

In the attached picture, I have the problem and the equations I've come up with to solve for the requested variables. I have found seven equations for the seven unknowns, however, after plugging them into a calculator my answer is wrong. Which equation(s) is/are wrong, and why? Relevant...

Homework Statement Given data of the given tuned R-LC circuit: Q=1000 f_{resonance} = 1MHz I = 15 \mu A V_{s} = 2.5V R_{L} = 10kΩ C=2nF Calculate the bandwidth, half-power frequencies, the value of R and L. Estimate the impedance offered to the supply at resonance and...

Today at work I was thinking hypothetically about a simple circuit that I was unable to get an answer that made any sense. What if you had a simple 12V source with a 5Ω resistor in series, also in series with a black box that consumes 60W of power. You aren't given any characteristics about...

Circuit Analysis -- Resistors and a battery Homework Statement Hello, if you see the attached I am trying to find the current I4.My plan was to find Voltage across R4 and use Ohm's law. Homework Equations V=IR The Attempt at a Solution I have simplified the circuit down(attached pic), I...

Homework Statement I have got transfer functions W(s) and Wk(s), where Wk(s) is correction transfer function. So I calculate W(s) and Wk(s) in series. Magnitude graph before correction: Magnitude graph after correction: The task is to make whole circuit and simulate it. Homework...

I have just started studying this topic and I am confused about several things. 1) Why does the assumption that D1 is reverse biased mean it is modeled as a switch? Are reverse biased diodes always modeled as a switch? 2) Also, why does the assumption that D2 is forward biased means it can...

Homework Statement A1 = 5A, A2 = 4A, A3 = 3A. V = 120V a) Given the circuit above, find A4 b) Find the angle between E and IT. Draw a diagrammatic (?) and find the power in the circuit. c) Find the values of R, L and C. Homework Equations The Attempt at a Solution...

Homework Statement From this circuit diagram assume Vs and R1 through R2 are known. Find the following: a) How many unknown currents are there? b) How many independent equations can be written using KCL? c) How many independent equations can be derived from KVL equations...

Homework Statement Switch S is closed for long time in the figure shown. Find the current i as soon as the switch is opened. The Attempt at a Solution At t=∞ inductor behaves as closed circuit. So, I can simply replace it with a wire and calculate the current which comes out to be 9A...

Homework Statement Hello everyone! I have the following circuit to solve, and my result is a bit wrong... can you tell me please where's the mistake? E=10sin(1000t) Find the current delivered to the circuit. Find the equivalent impedance of the circuit. Find the equation of the current and...

Okay so I have been working on a problem for practice for an exam and this one question is really pissing me off. I can't find what I am doing wrong and I've redone it about five times. The question is asking for the admittance of the circuit and the answer is given as 2.29 S at an angle of...

I have this problem where it's asking for the unknown voltage V(b). What information I get is what is in the image provided and that R1= 1 ohm. Okay so as I start this problem I remember that the voltage drop across the terminals is pretty much equal to zero because the current flowing through...

I teach intro, calc-based physics. Below is a terse summary of my recipe for analyzing simple battery-resistor multi-loop circuits. It was working well, until we tried the circuit seen in the attachment. Depending on our selection of simultaneous equations, sometimes our analysis produced...

I am hoping that general physics is the correct location for this problem, but if I am wrong please say so. I have a problem where two capacitors of different value are in series and are attached to a DC source. Homework Statement Image is a bit blurry but that is how our professor...

Homework Statement i(t) = 0 for t<0 and 5*cos(50t) for t>=0 Vc(0) = 0 Circuit is current source, 5 ohm resister, 2 Henry inductor, and 3 Farad capacitor in series. Need to find Vr(t), Vl(t), and Vc(t), voltage across resistor, inductor, and capacitor. Homework Equations V= IR...

When writing the question for the phase response of a circuit, how do I know when it begins. Like for example theta(jw) = 90 degrees - arctan( ) or theta(jw) = 0 degrees - arctan( ) ?

Homework Statement Hi, this is my first time posting so if there is any advice on how to make this post cleaner, please tell me! I've been stuck on a problem and I can't figure out what I'm doing wrong. I have attached the problem and the attempt at solving the problem below. I am supposed to...

Here I have a problem I am dealing with. I answered the question and have it shown on the picture but I would like a double check on it as I think I am getting wrong values. The circuit is shown at the top of the page. If you can't see the values are 10 ohms for the resistor, 3.2 mF for the...

Homework Statement Find the voltage gain, V0/Vs, for the circuit below. All resistors are in Ohms. Homework Equations I identified this as a non inverting amplifier. Therefore: V_{0}=\frac{R_{S}+ R_{f}}{R_{s}}V_g The Attempt at a Solution Vo = 8/3*V1 (v1 = output of U1)...

I bought engineering circuit analysis by hyatt, 8e (Indian edition)The book is great in explaining concepts but the answers to the excerise problems are not given. in the website mentioned in book there are only answers to selected problems for first six chapters, what about the remaining 12...

Hi, I am given a node voltage problem to find V1, V2, and V3 from this image below. http://puu.sh/77Sg3.png (v1+15)/20 + (v1-v2)/25 + (v3-v2)/50 + (v3 - 10)/10 = 0 18V1 - 12V2 + 24V3 = 50 V2: (v2-v1)/25 + v2/40 + (v2-v3)/50 = 0 17V2 - 8V1 - 4V3 = 0 15 = V3 - V1 Am I in...

Homework Statement Attached an image. Homework Equations KCL The Attempt at a Solution 80 = 10i1 + 20(i1 - i2) + 30(i1 - i3) 30 = 12(i2 - i3) + 20(i2 - i1) 0 = 40i3 +30(i3 - i1) + 12(i3 - i2) 80 = 60i1 - 20i2 - 30i3 30 = 20i1 + 32i2 - 12i3 0 = -30i1 - 12i2 + 82i3 i1...

Homework Statement I have attached an image of the problem: Homework Equations KCL Equation The Attempt at a Solution 0 = 2i11 + 3(i1-i2) 212 = 3(i2-i1) + 5(i2-i3) -122 = 3i3 + 5(i3-i2) 5i1 - 3i2 = 0 -3i1 +8i2 + 5i3 = 212 -5i2 + 8i3 = -122 Is this the correct approach? Also, does anybody...

Hi everyone, My subject basically revolves around diodes circuits and how to analyze them (AC, DC). What textbook do you recommend? (If there's one with many solved problems, that would be great.)

It is well known that in order to solve diode circuits we must assume state of diodes, replace diodes with appropriate model (0.7V voltage drop) and solve circuit. Then we check result and if it agrees with initial assumption, we successfully solved our circuit. If we mark number of diodes in...

Hi I need a good book for circuit analysis (preferably, it should be available on my cell phone via, for instance, Kindle or Aldiko.. Or PDF). My curriculum includes AC and DC circuits with: Resistors Capacitors Inductors BJTs Diodes FETs (JFET and MOSFET) Opamps I have to be able...

The problem I am having is determining what is in series and what is in parallel. Now I am working with v1, so I1 has been removed and replaced with an open circuit and v2 has been replaced with a short. So does that mean that r2 || r4? and if so, does that also mean that r2 || r4 which...

Hey, I've found circuit analysis super difficult all my life. Just not one of my things I was born to do. However, now I am doing electronics engineering so that topic often in lectures. In class we have to do analysis of complex transistor cirucuit analysis using 2 port network and norton...

Homework Statement Problem A http://imagizer.imageshack.us/v2/800x600q90/855/6v0c.png Problem B http://imagizer.imageshack.us/v2/800x600q90/853/1m2c.png http://imagizer.imageshack.us/v2/800x600q90/34/wfe4.png Homework Equations Kirchhoff's Rules/Ohm's Law Voltage Divider...