Equivalent Definition and 1000 Threads

Homework Statement There is no problem, ^title^, just a quick question :) The book's answer: \frac{x\sqrt{x}-x\sqrt{2}+2\sqrt{x}-2\sqrt{2}}{x-2}} My answer: \frac{x+2\sqrt{x}-x-2\sqrt{2}}{x+2} I combined like terms in the numerator... at least I think I did it correctly?

Homework Statement Find the Thev Eq circuit for a DC power supply that has a 30-volt terminal voltage when delivering 400mA and a 27-volt terminal voltage when delivering 600mA. Homework Equations KVL: Vs=IsR1+IsR2 Vth=Isc*Rth The Attempt at a Solution Assuming that each 3volt...

Homework Statement Find the equivalent capacitance of the circuit below. Also determine the charge of each capacitor and the potential difference across each capacitor. http://img18.imageshack.us/img18/2616/physicss.jpg Homework Equations Q=VC Parallel Ceq = C1+C2+C3 V1=V2=V3...

Homework Statement A car battery has an open-circuit terminal voltage of 12.6 volts. The voltage drops to 10.8 volts when the battery supplies 240 amps to the car's starter motor. What is the Thevenin eq for this battery? Homework Equations I think the root of my problem is the setup of...

Hi Guys, :smile: Can someone please explain to me the logic behind the representation of 'Magnetic Hysteresis loss' as a resistance in electrical equivalent circuits?... will be extremely grateful. Thanks & Regards, Shahvir

Homework Statement Three 16 ohm resistors are connected in parallel and placed across a 34 V battery. (a) What is the equivalent resistance of the parallel circuit? (b) What is the current delivered by the battery? Homework Equations (a) (1/equivalent resistance) =...

Is it equivalent? ( \forall x \in S \forall y P(x) ) <=> \neg ( \exists x \in S^{c} \exists y \neg P(x) ) Attempt at solution I think it should be ( \forall x \in S \forall y P(x) ) <=> \neg ( \exists x \in S \exists y \neg P(x) ) The diiference to the above statement is S^{c}.

Homework Statement A capacitor network is shown below. http://img99.imageshack.us/img99/9967/79727282.gif What is the equivalent capacitance between points y and z of the entire capacitor network? Homework Equations In parallel: C = c1 + c2 + ... In series: 1/C = 1/c1 + 1/c2 +...

Homework Statement A network consists of a combination of parallel and series connections. What is the equivalent resistance of the network? (Hint: Use the series and parallel resistance formulas). The network looks like this: Homework Equations When a circuit is in series, R = R1 + R2 + R3...

I'm trying to determine the millicandela rating of an LED from a keychain to find equivalent LEDs of different colours. The keychain LED specs are as follows: Luminous Flux value: 4 lumens (from box) Viewing Angle: 30° (I got this value by comparing to LEDs with marked angles) Wavelength...

1. The problem statement http://s685.photobucket.com/albums/vv212/dewdr0p714/?action=view&current=3circuitontakehometest1.jpg The voltage is on the left (100V) and the jagged lines are the resistors in Ohms. I need to find the equivalent resistance of the circuit and after that the current...

Homework Statement I need to find the equivalent capacitance between points 1 and 2 in the following circuit, with each capacitor having capacitance C: Homework Equations For n capacitors in series: 1/C_t = 1/C_1 + 1/C_2 + ... + 1/C_n For n capacitors in parallel: C_t = C_1 + C_2 + ... +...

Hi! Good day! I was studying Circuit Theorems when I stumbled upon this circuit that has a dependent current source asking for a Thevenin equivalent. Up until now, I was only familiar with solving circuits with independent sources so this has me having a hard time. I tried using...

Homogenization of a plate to an equivalent rod... Folks, I have a doubt... Sorry if it is a really stupid one...:rolleyes: Imagine you have a steel plate say 200mm by 200mm in dimension, with a stiffness of say some "k" N/mm... Is there any formula to convert that plate into an...

Homework Statement Find Vo in the circuit. Image of Circuit Diagram Attached Variables: Vo, Io Given: Current (15 mA) Resistors (300\Omega, 300\Omega, 2k\Omega, 10k\Omega, 200\Omega, 3k\Omega Homework Equations Resistors in Series: Ra+Rb+Rc...+Rn Resistors in Parallel...

Homework Statement If two square matrices, A and B are unitarily equivalent then A = QBQ* for some unitary Q of the same size as A and B. Prove that A and B are unitarily equivalent if and only if they have the same singular values Homework Equations The Attempt at a Solution I...

Homework Statement Find the Resistance between terminals B-C, B-D Homework Equations The Attempt at a Solution The book says that the 2 80-ohm resistors are in parallel for terminals A-B, and the answer for B-C=90ohms, B-D=85ohms. I don't quite understand why this is. Is it...

Well, is there? :shy:

I have to find the thevenin equivalent of the following circuit in order to find the current and potential difference across the 6 ohm resistor. I can not get to know that where should I start. Should I divide the circuit into 2 parts or what? http://img141.imageshack.us/img141/2690/416qr1.th.jpg

I start with the Thevenin equivalent. \hat{R} = R_2 + R_4 || R_1 = 6 \Omega R_{Th} = R_3 + \hat{R} || R_5 = 8 \Omega The correct answer here should be 2 \Omega

Finding the thevenin equivalent of the above circuit This is what I did, I set the current source to zero, no current passes through so the Rth is the resistor on farthest right // with another 2 in series with 4. so it is 5ohms? Finding the open circuit voltage, I use a current...

Hi All, My name is Joaquim and I'm new in this forums. I am a Electronic Engineer student (1st Year). I have a question about a Thevenin equivalent circuit in AC. I need someone to tell me if I'm doing the right math in finding the thevenin equivalent (AB point): Please see the...

Homework Statement Hi. Why does one conduct an open-circuit and a short-circuit test on a transformer to determine its equivalent circuit parameters? I've read that a) the open-circuit test determines the parallel parameters - the R and X equating to the core loss, and b) the short-circuit...

Hi. Why does one conduct an open-circuit and a short-circuit test on a transformer to determine its equivalent circuit parameters? I've read that a) the open-circuit test determines the parallel parameters - the R and X equating to the core loss, and b) the short-circuit test determines the...

on a 3d graph i have 3 forces in different places pointing different directions. I am supposed to find the equivalent force-couple system about some point D. but 1 of the forces is aligned with point D and therefore creates no moment about D. how would i do this? Do i just find the moment of...

Homework Statement use thevenin's theorem to find the current in the 3 ohm, parallel branch, resistor http://img217.imageshack.us/img217/909/img0267cc7.jpg Homework Equations Thevenin equivalent circuit, voltage divider ruleThe Attempt at a Solution I don't think its possible, since...

Homework Statement Hello, I was given this problem as a homework assigment. Each capacitor in the figure has capacitance C. What is the equivalent capacitance between points a and b? The answer is given in "C_eq/C" Homework Equations I used the...

I need help proving that (A then B) then C and (A and B) then C are equivalent. Can anyone help?

I need help proving that (A then B) then C and (A and B) then C are equivalent. Can anyone help?

Homework Statement Find the equivalent resistance between the two terminals :- Homework Equations Totally confused. The Attempt at a Solution Totally confused here as well...

Hey everyone, In my EET program we're going over AC equivalent transistor amplifiers. We've gone over how to do some of them in class but I can't seem to figure out how to find roe. I have the output characteristic of our 2N2222 transistor and made the DC load line but I'm not sure were to go...

Suppose that ||f||= int 01| f(x) | dx and f is a piecewise continuous linear function on the interval [0,1]. If ||| f ||| = int 01 x | f(x) | dx, determine if the two norms are equivalent. I know the first defines a norm, and the space is not complete. Can anyone offer any hints as to...

I've been looking into some summer Research Experience for Undergraduates (REU) programs here in the US, but is there some kind of equivalent program for countries in Europe and elsewhere?

Homework Statement Here is the problem I am stuck on, need some advice Homework Equations ----- The Attempt at a Solution I found the moment to be -19.282 for the system shown (not sure if it correct) but I am confused about how to drawing will look for the equivalent system. (- is added for...

Let a_1, a_2, ... be a bounded sequence of real numbers. According to Rosenlicht's "Introduction to Analysis", the limit superior is defined as sup {x : a_n > x for infinitely many n}. It is very hard to work with this definition. I'm used to the simpler one: sup {a : there exists a...

Homework Statement Show that d and p are equivalent metrics on X where p=d(x,y)/(1+d(x,y)) Homework Equations ive proved already that p is indeed a metric too (if d is a metric). The Attempt at a Solution I believe I am supposed to use the Lipschitz condition where there exits...

1. This is part of a larger calculation. I do it one way and get the right answer and do it a seemingly equivalent way and get the wrong answer. The question is just about reconciling the two integrals below. 2. I_1 = \int \frac{sin(2x)}{2} dx = -\frac{cos(2x)}{4} \frac{sin(2x)}{2}...

Homework Statement http://img394.imageshack.us/img394/2907/54050356xf9.png The Attempt at a Solution I'm stuck at exercise (e). What I have to proof is that there is no M>0 such that: ||f'||_{\infty} \leq M \cdot ||f||_{\infty} But I'm having a hard time showing that for...

Homework Statement Find equivalent capacitance between terminalsHomework Equations C_eq = C_1 + C_2 for parallel C_eq = 1/((1/C_1) + (1/C_2))The Attempt at a Solution I can't tell what's in parallel and what's in series. That conductor in the center is throwing me off. Any help por favor? You...

Homework Statement I am given two waveforms (a square wave and DC) that define the maximum allowable operating parameters for an LED. I wish to derive the maximum allowable fully-rectified sine waveform (120hz). Square wave: 442mW peak, 0.1ms pulse width, 10% duty cycle DC: 87mW See...

what is the equivalent circuit for a non ideal capasitor? and if we have a parallel plate capasitor which consist of 2 metal plate of area A and held a distance apart d,we fill the region between the plate with a material with conductivity s and permitivity e.what is the inductance,resistance...

Does anyone know of a Mathematica equivalent software for Linux? A link for download will be good.. Thanks

I have reduced the problem involving different forces and a couple in a 2D plane to an equivalent force-couple system. The force F is -27.5lbi + 11.65lbj, and the couple is -66.8inlbk. I need the single offset resultant that accounts for the couple. The way I thought to solve it was to take...

Homework Statement Edit Circuit looks messed up, if you can quote me you can see the text of the circuit This is how the circuit looks*--------------------* | / \ | R2 R3 R1 / \ | *-------...

Would it be possible for a symmetric axial vector torque to be equivalent to the shear stress of two uniform rectilinear forces? as they seem to be non-related, but it works out that they should be.

Let <r,θ> be polar coordinates on R². Define f:R-->R² by f(t)=<et,t>. Let d1 and d2 be the metrics on R defined by: d1(t1,t2) = |t1 - t2|, d2(t1,t2) = ||f(t1) - f(t2)|| Are d1 and d2 equivalent? If not, is one finer than the other?

The first diagram is the given circuit. The second diagram is what I narrowed it down to. If anyone can check to see if the circuits are equivalent, I'd very much appreciate it. http://s62.photobucket.com/albums/h116/pepsi_in_a_can/?action=view&current=untitled2.jpg...

I trying to figure out a thevenin equivalent circuit I want to calculate the current I so I can't get the resistance for the thevenin equivalent. Im not 100% sure how to calculate I, can I use KCL on the node under the number -8.7V? http://img98.imageshack.us/my.php?image=curfc7.jpg

Hi All I'm trying to work out a method to determine the efficiency of a compressed air motor. Obviously I can measure the input pressure and flow rate of the compressed air, and I can measure the output power of the motor with a dynomometer. What I want to know is how much energy is...

List the values of the magnetic quantum numbers ml1, ml2 ms1 and ms2 for the two electrons in a np2 configuration to show that fifteen degenarate states exists within the central field approximation. ml can take values -1,0,1 i believe. ms can take values -1/2 and 1/2. how does this ad...