Output Definition and 1000 Threads

Hello everyone, I just have a few questions concerning TE and TM modes in a dielectric slab symmetrical waveguide. 1) How do the TE and TM mode profiles affect the actual light pattern being output on the waveguide face/facet? What determines the actual light patterns on the waveguide face...

Homework Statement In a particular application, the generator output is converted to DC and used to power an immersion element for water heating. 1). Sketch the shape of the output voltage at a rotation speed of 300 rpm assuming the amplitude on each phase is 30V? The Attempt at a...

So, in my studies of math so far, we can take a certain geometry (or just any function) and analyze it, and ask questions about it. The answer that's given in all the work I've done so far is a number (or a function that will reduce to a number when solved). Now, let's say I want to do the...

Okay then :smile: Here is a piece of the code that I am using: ' Send to File MyPath = "Z:\Casey B\MathML Converter\" & "MathMLAsString.txt" fNum = FreeFile() Open MyPath For Output As fNum Print #fNum, EntireMLText Close #fNum This saves my work to a text...

Will a bridge rectifier circuit without a filter or load resistor connected across its output deliver a pulsating unidirectional voltage ? An oscilloscope trace (dc input enabled) did show a trace of a full wave output though the half sine did not swing down to zero voltage completely and...

can anyone help me with this>>> * If the input is Given by Vin = V0 cosωt, plot the output of the circuit as function of time. assume an ideal diode model. *

What i got is a permanent magnet 2 1/4HP@130v DC treadmill motor and everyone know those work awesome as generators. I've also got a 1000Watt inverter which needs an input voltage of 11 to 15 volts DC. Now if the input voltage to the inverter drops below 11 volts it sounds a low voltage warning...

I am trying to adjust the output voltage of my 12v DC adapter. Is it possible to wrap the wires of the adapter around a toroid in a closed circuit, and then wrap another wire around the toroid to have the output voltage of this wire decreased, and the current increased? Example...

I am running (a very basic) simulation of the proposed LIFE concept reactor at LLNL as part of my MSc thesis. What I hope to achieve is to calculate the fission energy gain from a fissile blanket surrounding a source of fusion neutrons (ie D-T pellet blasted by lasers) The problem summary...

Hello All, For those of you who haven been following my last two threads, I finally decided to go with the Microcontroller/DDS combination to make my three-channel sine wave generator (since I have yet to find one in existence at all that doesn't cost megabucks). I have the microcontroller...

T The question is about the concept of the operational amplifier in electronics. For an ideal op. amp., it is said that the input impedance is infiinite and the current allowed by the op.amp. through its input terminal zero or in the case of a practical op.amp., it is nearly zero or negligibly...

This post is similar to the one that I made the other day. There are two problems that I am having trouble understanding. The link is below: http://img510.imageshack.us/img510/4396/diodeproblem.jpg They are numbered 4-5 (Ignore 3) . Once again I know the predictions are correct , because I did...

Homework Statement The question is about the concept of the operational amplifier in electronics. For an ideal op. amp., it is said that the input impedance is infiinite and the current allowed by the op.amp. through its input terminal zero or in the case of a practical op.amp., it is...

The link provided shows two cases of reverse bias Diodes. From my understanding a reverse bias diode is supposed to block the voltage from reaching the output. So from the following picture wouldn't both of the outputs be 0v. I know that the answers in the diagram are correct because I did them...

i am planning to make a magnetic generator & i have a question : if i provide a disk with 12 numbers of neodymium (1x1”x1”cylinder) (n48) magnets around it , moving by motor clock wise at 1500 rpm , ( magnet specification: Br: 13.80- 14.20 KG, Hcb: > = 10.5 Koe, Hcj: > = 11 KOe ) the...

In the formula P=Tw, where T for torque(ftlbs) and w for angular velocity(rad/s), what is the unit for P(power)?

i am asking about the generators we use in house when there is a power failure(now a days people use inverters) here goes the question suppose the generator is running (max ouput is 1kw) but we are using a electric bulb(100w) is it running in its max potential or using less fuel compared to...

anyone have equations for bitter magnets? or do i use the ones for solenoids? i need an electromagnet capable of 4T. that doesn't use super conductors >_> i have access to liquid nitrogen though.

Hi, all! The camb code is available at http://lambda.gsfc.nasa.gov/toolbox/tb_camb_form.cfm in a web interface form. One of it's output files, named something like camb_13685314_scalcls.dat should contain the scalar C(l)'s. Can anyone tell me, what exactly is contained in...

TCS230 output problem. HELP URGENT! Hi guys, I am working on TCS230, a CMOS color sensor, so I am really confused what the problem will be. please someone. actually my sensor was working well, but the output, when i measured it in oscilloscope, its not stable, like an example. i...

hi, i want to display into IDL a mollview projection of the output fits file ('test_scalCls.fits') of CAMB program (Code for Anisotropies in the Microwave Background) but can't get it. I have IDL ASTRO, Healpix_2.11c and WMAP librairies and i tried several things: 1*/ HIDL>...

Homework Statement A battery supplies a steady current of 5.6 A for 21s. During this time 1410J of chemical energy is transformed into electric energy, but 560J of this electric energy is transformed into heat energy inside the battery. a) What is the emf of the battery? b) What is the...

Homework Statement A model Stirling engine uses n = 8.04 × 10–3 mol of gas (assumed to be ideal) as a working substance. It operates between a high temperature reservoir at TH = 98.0 °C and a low temperature reservoir at Tc = 25.0 °C. The volume of its working substance doubles during each...

The Earth has a surface temperature around 270 K and an emissivity of 0.8, while space has a temperature of around 2 K. Use Stefan's law: P(net) = 5.67×10-8 W/K4 m2 *A*e*(T4 - To4) to solve the following questions. (Radii of the Earth and the Sun are Re = 6.38×106 m, Rs = 7×108 m.) (a)...

Homework Statement 1. A wind turbine with a swept diameter of 20m and an efficiency of extracting energy from the wind of 40% is subjected to an average wind speed of 10m/s. (a) How much power might the turbine produce? Please can some one point me to the right equation as everyone I...

Hello, I am currently using a Fortran program to run a simulation which involves an explicit differentiation loop. The program currently plots simulation data at specified time intervals using a subroutine with another program. I'd like to have the program also output data files at these...

Hi, I was asked to find the relationship of output voltage of a piezoelectric film or a beam with known dimensions when it is subjected to a known frequency vibration. I appreciate if someone can help me with that. Thanks,

Homework Statement Draw a graph of the output voltage waveform of a 3 phase half wave rectifier (unfiltered), when the AC. input voltage is 24.0 V rms. Label both axes with a title and scaling, and indicate peak and average output voltage levels. Homework Equations Average output...

Hi I am struggling to answer this question: The input coupling circuit of the amplifier shown in the figure consist of an RC network, with R = 1 kW and C = 5mF fed by a sinusoidal voltage source of r.m.s. amplitude of 200 mV. Assuming that the input impedance of the amplifier is, at all...

My textbook says that the output of comparators can be "wire ORed". What does wire OReding an output mean?

Hi everyone ! I am new here. I am currently a mechanical engineering student who's doing a project involving control systems and regenerative braking. So far my system of parts include a Pressure transducer attached to a foot pedal. When the brakes are applied the pressure transducer will...

I am making a script-m file to produce results of a formula in a Matrix output. function s = calc(a, b) i = [-a: 1: a]; j = [-b: 1: b]; k = i.^2 + j.*i; A = [i' j' k'] disp('i j k'), disp(A) But, it does not consider all combination. How can I make it stop at a 'i' value so...

When I connect 3V negative and 3V postive power supply to an OP07 op amp and I Connect a voltmeter to OUT of op amp and GROUND the voltmeter shows -1.8 volts why? I have connected anything to input I even tried shoring the input and this voltage is too high to be offset voltage. I Tried two...

Hi I was hoping someone could tell me the approx. amount of radial force needed to keep a 10000W generator turning while producing maximum output if there is a 1ft pulley connected to it that does the turning. Thanks

Homework Statement What would be the output of a transformer plugged into a DC voltage source by mistake? Homework Equations N/A The Attempt at a Solution Judging from the phrasing of the question, I am assuming that a transformer should not be plugged into a DC voltage source...

I need help understanding a few different items regarding electromechanics, and I'm not really sure where to start. Though the figures I have provided immediately seem impractical (coil melt down, coil explosion due to excessive rpm, inside dimensions exceeding their respective outside...

How do i plot an output response curve when input unit steps are (undamped natural frequency is normalised to 1): damping ration = 0, 0.1, 0.4,0.6,0.8,0.9 1 and 2 1) how do i plot a 2d plot for all curves on same graph. Time scale 0 - 10, steps of 0.2 seconds. 2) How do i make use of a 'for...

Hi, I was studying calculus and I had a problem while checking my results. I came to the following result: \int_{\frac{\pi}{6}}^{\frac{\pi}{2}}\frac{1}{\sqrt{\sin t}}\:\mathrm{d}t = \sqrt{2}\cdot \mathrm{F}\left(\frac{\pi}{4},\frac{1}{4}\right) \approx1.16817 However, Mathematica shows...

Hi I have a question to do with using PWM If for example I had a 1ohm load and a voltage supply of 4JC-1, I would get a power draw of 16JS-1, now if I had a duty cycle of say 50% I should get an average power output of 8JS-1. However if i thought of it as having an average current of 2CS-1 and...

We are using a DAQ (data acquisition) board for our project, that has only 2 analog outputs, but we need 4. It also has some digital outputs... Is there a way to convert the digital outputs into analog, and if so, what is it? Thanks

Hello Can someone help me with this? I've been struggling with it for some time and haven't found a solution yet. Let's say we have the circuit in the attachment. There is a number of inputs (4 in our case) and an equal number of outputs. The problem is: if at least one input is HIGH...

Hey there fellow engineers, I have a question to pose for a project I am carrying out. I currently have a GPS logger I have created myself and was wondering if anyone knew how to take the GPS data (in minimum NMEA forum- so just time and longitude and latitude values) and import this...

Hey, I'm a newbie trying to figure out a few crucial additions to my circuit I'd like some tips and suggestions.. Basically, I'm building a circuit that will produce a constant current to variable loads, I'm using a buck-converter model with a supply of around 10V, the inductance should be...

I am trying to write data to a .txt file and want each set of data in a column, so I want 2 columns. However I am currently only getting the entire data set in one big column. I am trying to output the year and the rainfall for that year into a .txt file. Can anyone help me with this?

I have a question. I set up a voltmeter and and ammeter (properly connected in parallel and in series respectively) so that when I input power into a motor in the form of DC current, both the voltmeter and the ammeter read positive values. Then, I removed the voltage source (i.e. battery)...

I am trying to charge a battery using wind power! but i can't seem to find anything telling me how i can determine the power output coming from the generator, when all i know is the wind speed.. i know that the blades on the fan will have to be small but using the right gears with the high speed...

Suppose that the system of figure (a) has the input x(t) given in Figure (b). The impulse response is the unit step function h(t) = u(t). Find and sketch the system output y(t). http://qaboard.cramster.com/answer-board/image/a4d35f0d5eef154398161f9124b69a59.jpg...

Hi, I looked around in some forums, but couldn't find a good answer to this problem: my programmes produce several output files. When the programm is finished, I add certain simulation parameters to the file name, so that I see later, to which simulation run this file belongs. (for example...

I'm having difficulty visualizing what the output of an antenna looks like. Would someone care to explain? This is where I am stuck. Imagine we have a point source that transmits energy. If at time t0 a pulse occurs which outputs a spherical wave, and some time later (say t1) another pulse...

Hello every1 I hav a basic question bout Design of inverters(Voltage source inverters). Wel Actually what does designing mean? I hav to design a inverter whose output Peak voltage is 50v. The input DC voltage wil b around 55V.I'm using single phase full bridge inverter And i'll b using R...