Network Definition and 444 Threads

Find V2/V1 for the network below: What I did was try to solve by reducing to thevenin equivalents for V1 and V2 separately For V1: I got Vth = V1 Zth1 = 41/15 V1 = I1*(41/15) For V2: I got Vth = V2 ...but I am having trouble trying to find the Zeq2: I know once I find that V2 = I2*Zeq2 and...

I'm having trouble finding the impedance of the simple given network below: I know Z(s) of each capacitor is 1/2s, but I'm confused on what's in series/parallel. How can you tell? I know it has to do with the nodes. Any help would be appreciated.

Homework Statement Greetings. I am having difficulty with a couple of parts to a homework problem. Mainly coming up with the transfer functions to plot V_o. See the picture for the problem statement: http://img827.imageshack.us/img827/5481/problempa.jpg Homework Equations l \leqq...

Today our physics teacher teach us how to find resistance of a network of resistance that is messed to heavily(example all sides of a cube are resistance find resistance). Ok those are very good methods, but it seems that they are not result of experiments done by genius persons it seems that...

my problems comes from one of a book how to solve this one this is regarding with two port electrical network

my problems comes from one of a book how to solve this one this is regarding with two port electrical network

Homework Statement I need to calculate the resultant resistance between points A and B The |-| parts are short curcuited ideal DC power supplies (illustration only) This is the circuit: Homework Equations R_P = \frac{1}{\frac{1}{R1}+\frac{1}{R3}+\frac{1}{Rn}} R_S = R_1 + R_2 +...

[b]1. Hi everyone, i was given an AC circuit (capture.png) and am required to find the value of the variable resistor Z so that average maximum power is delivered to it. To solve this i am trying to find the thevenin equivalent circuit but i am stuck and unable to figure it out. Any help would...

Homework Statement I am doing an assignment in my Linear Algebra class. But I don't know how I will go about solving this problem. So the problem is a network of water pipes. I start with a matrix and I get the solution to the system from the RREF matrix. All the flow directions are set, so...

hi i need help with some pi matching for the following cct shown below, i would usually approach this problem with X=sqrt(1000*50) where X is the reactance of L1,C2,C3 but since C1 is in this cct then i can't use this equation so could someone please help me solve this problem

Hi, I am trying to model a PDF of frequency for the WCDMA handset. I have found some info on ways of graphing a PDF of transmit power but nothing on frequency. I am hoping there is a way to model this, but think it might be something that requires field tests with multiple phones. Any...

Homework Statement I'm supposed to find whether the current in the following network is a) under-damped b) critically damped c) undamped c) over-damped Homework Equations According to Kirchoff's laws The Attempt at a Solution The answer given by my professor for this...

Homework Statement Can someone explain to me what are these theorems with proper example? (a)thevenins theorem (b)nortons Theorem (c)super position principle Homework Equations The Attempt at a Solution

Hello friends...in this questions the answer is (b) option...this is from indian engg. services exam. if we apply mesh in loop which i have shown , then we find that I = (10 - 5 )/10 = 0.5 amp V=10 - 6 I = 7 volt (right acc. to answer keys)...

Calculate the charge Q1, on the positive plate of capacitor. In a previous step in the problem I found the Ceq to be 7.6E-6 and know this to be the correct answer. Q=VCeq I used the equation above but the number I found was incorrect. I am also asked these question and I have no idea what...

What is the equivalent capacitance of the network. Parallel: C1 + C2 + C3 + Cn = Ceq Series: 1/C1 + 1/C2 + 1/Cn = 1/Ceq I added C2 C3 C4 and C5 as parallel and then added this to C1 as a series.

I want to separate my computer from the rest of the network in my home. I'm really scared about getting viruses through the home network because of other people in my family. I want a computer to use that I know will be safe for dealing with money online. Any ideas?

How do I reduce this resistor network. The input current and the return current should be equal. But in this case, some current will also flow to ground. Can't get my head around this.

Greetings, Maybe I'm getting a little bit confused, but I'm looking for resources which explain how to update parameters of a Bayesian network as a result of observations. There are various inference methods, but unless I'm missing something here, these methods produce a posterior...

Homework Statement P = [data(1:65,11:100) data(1:65,411:500)]; % Input, all together 180 data set, 65 dimension T = [ones(1,90) zeros(1,90); zeros(1,90) ones(1,90)]; % Actual output, first 90 data set belong to class I and the next 90 belong to class II net =...

Please see attachment for the problem. I used the rules for parallel and series resistors to find a total resistance in the network of 4560/59 ohms and then found a current of 59/152 amps through the 20 ohm resistor in the original problem. Am I correct?

Homework Statement A network of resistors has a pair of input terminals AB connected to a dc supply and a pair of output terminals CD connected to a load resistor of 120 ohm. The resistances of the network are AC=BD =180 ohm, and AD=BC=80 ohm. Find the ratio of the current in the load...

I'm having some problems understanding resonance in an LCR network where the capaitor is in parallel to the inductor and resistor, which are in series. How would you go about deriving the equation for the transient response (to a square wave) and the steady state response to a sinusoidal wave...

Hi everyone, My data consists of road accidents and spatial covariates. Originally i wanted to apply an inhomogenous Poisson process with covariates. Then I realized that the accidents cannot occur everywhere in space, but only on roads. I found an example, that is quite similar to mine. it...

This fascinating question was asked by our favourite blogger at http://physics.stackexchange.com/questions/5517/dual-conformal-symmetry-and-spin-networks-in-abjm .

So many telecom operators claim that their users will get network coverage even inside an elevator. But according to Gauss' theorem, no charge is supposed to exist inside a closed conductor and an elevator (made of metal) is a closed conductor... So how is one supposed to get network coverage...

I currently have a duel operating system with windows 7 and Ubuntu. The problem I am having is that my ubuntu (10.10) is not DETECTING my wireless router. How do I fix this? Please explain simply as I am 13. thanks.

I can't translate it 100% correctly, but my course notes describe two different properties of a medium: Literal translation: "The band width." - ? "The band width of frequencies" - as the difference of fmax and fmin What does each exactly refer to, and what's its name in english...

Why does the resonance peak of a parallel LCR network (capacitor in parallel with in-series inductor and resisitor) get smaller in amplitude with increasing resistance? I have impedance/DC resistance plotted against frequency. I'm really not sure about how to go about showing this...

Why does the resonance peak of a parallel LCR network (capacitor in parallel with in-series inductor and resisitor) get smaller in amplitude with increasing resistance? I have impedance/DC resistance plotted against frequency. I'm really not sure about how to go about showing this...

Homework Statement Calculate the equivalent resistance between the points X1 and X2. Homework Equations R series = sum of resistances R parallel = reciprocal of resistances The Attempt at a Solution I'm sorry I do not get any idea on solving the question. I have done it in the...

Homework Statement http://img97.imageshack.us/i/physicsquestion.png/ Homework Equations R= V/I For Series: R[SIZE="2"]eq= R1+R2 For Parallel: 1/R[SIZE="2"]eq= 1/R1+1/R2The Attempt at a Solution I have two attempts remaining for each question

http://img571.imageshack.us/img571/3774/circuitb.png Uploaded with ImageShack.us For my a level homework i have to find the equivalent resistance in this circuit, i don't want anyone to do my homework i would just like to be pointed in the right direction. We have been doing a bit about...

Help -- electric distribution network reconfiguration for loss reduction using ACS Recently, I'm doing research based on electric distribution network reconfiguration for loss reduction using ACS, and my reference paper is the one from the link that i post. There are something about Table 1...

Is it known, or widely believed, that the cortex is a scale-free network? I.E. Do a large percentage of neurons have a small number of connections to other neurons, and do a small percentage of neurons have a large number of connections to other neurons?

How about a social network whose vertices are user-generated data objects (e.g. math article, jpeg image) and whose connections are based on request and confirmation between users? I.e. the user who owns vertex A can request a connection between vertex A and vertex B; the connection is...

Homework Statement Consider the electric circuit shown in the figure. Assume that V = 21.7 V, R1 = R2 = R3 = R4 = R5 = 6.00 Ohm. Part 1) What is the equivalent resistance of the circuit? Part 2) what is the electric current flowing through R4? Homework Equations Series and parallel...

i understand that there are times when one should (on paper) pump a network of resistors, capacitors, and inductors with a 1 amp ac current source or a 1 volt ac voltage source in order to determine certain values within the system however, i am having trouble determining when i need to use...

Hello, I read an article about a year or two ago and I cannot remember in what magazine I read it, so I was hoping to generate some leads by reaching out. I want to find it because my professor wants to see it as well. The article was about a team or group of physicists, at a certain...

Homework Statement I need to resolve this network and find the equation for voltage at some time, t'>0. I know how to find the equation, but I'm having trouble finding the value for tau because I'm not sure what the equivalent resistance is. Homework Equations tau = R*C R1 = 4 k...

Despite my reluctance my friend insisted i watch and as as expected i left the theater feeling a slightly less whole person. This movie is not only represents what's wrong with our own narcissistic society but reminded me how dull my own life life was. It's fun watching movies about rich people...

Homework Statement Thanks for looking/responding! Using node voltage analysis in the circuit, find the current i through the voltage source The Attempt at a Solution How do I know what direction the all the currents are going before I start analyzing each node? I know 2A is going counter...

Homework Statement A unity feedback system of the form: X(s)-------->Gc(s)---------->G(s)------------>Y(s) | | | | ----<------------1---------<---- has a plant: G(s) =...

The Dish network is offering a free trial of the IFC Network. Right now, I'm watching Jay and Silent Bob Strike Back, and it's hilarious. At 10:00 the Onion premieres.

Homework Statement I want to derive a general formula to calculate the average distance of the nodes in a network topology. The topologies can be line(linear), ring, mesh etc. The different nodes are numbered 0,1,2.. N-1. I understand the diameter of the network etc. Homework Equations...

Hello all, this is my first post here. I know these things have been discussed before in this forum, but that was several years ago, and I have some questions that weren't asked. Basically, I need to know how information is stored in the brain, presumably as memories. What I already know is...

I have a question about network flow pressure drop. In a piping system with several identical components in parallel, is the pressure drop across the supply and return header equal to the pressure drop across one of the components? Or is it the inverse of the sum of the inverses? To use...

Homework Statement the problem that i attached bellow is related to how you can obtain a transfer function from its squared magnituded. my question is not on the problem it self as its just a solved example from my book. what i find difficult to understand as you can see from my...

Homework Statement Determine Vo for the following network [PLAIN]http://img535.imageshack.us/img535/7041/63014601.jpg. Homework Equations Too many to list I would think. I'm pretty sure I have to use KVL. The Attempt at a Solution My classmate told me the answer was 2.45V. I...

I am designing a loop antenna with a switchable resonance point from 500Hz to 99500Hz in increments of 1000. I am trying to switch resonance by changing the value of the capacitor by making a network of caps in parallel that are turned on with a mosfet. My problem is that the resonant frequency...