Electronics Definition and 643 Threads

Homework Statement So in this circuit http://img850.imageshack.us/img850/5061/circuittoregulate.jpg Given that alpha = 60 degrees I'm asked to draw qualitatively Vin, URL, UAK, and IAK. Now Vin and URL are simple, but what ARE UAK and IAK? What are they? I don't see an "A"...

Sorry I'm jumping from one problem to another, I just have plenty of time today and I got my scanner :smile:Homework Statement Find Ic, Ie, Ib (circuit drawing and data in the solution) The Attempt at a Solutionhttp://img263.imageshack.us/img263/3285/findcurrents.jpg Is that correct for Ie...

Hi, I'd need some help regarding some parts of an exercise (attached below). The question is that they make me assume that the tranistors is working as a chopper, so then I have many things to calculate. The question is, which kind of chopper should I assume? Thanks in advance...

Homework Statement http://img198.imageshack.us/img198/1421/vintm.jpg Given that k = 2 A) Draw in a qualitative manner the following letters Vin, VP, Vs, Uxy, UR1, UR2, UD B) Calculate the power in R2 C) Calculate the average current through R1 The Attempt at a SolutionI'll start with a...

Homework Statement A 3-phase, 10KV, busbar of a power station is divided into three sections joined by two reactors as shown in Figure 1. Each section contains a synchronous generator and supplies a transmission line through a transformer. The parameters of genera-tors, reactors and...

Basic electronics problem with an "amplification factor for a transistor" ((I think it still counts as "introductory physics" -- let me know if I'm wrong!)) Homework Statement http://img600.imageshack.us/img600/7950/back1j.jpg http://img690.imageshack.us/img690/999/back2wzt.jpg...

I will be doing Electronics engineering, and in the next 4 years, will be an engineer. But actually, I want to get into research field. Astronomy fascinates me. Can I pursue a Mtech in Astronomy after my engineering? Or in something else related to research in space? Also, I am from India. And...

Electronics , Nuclear and Particle physics , which one has the most importance today life?

Back again to ask another question about test equipment. I'm very new at this so please bear with me. I'm trying to work through this https://www.amazon.com/dp/0521646456/?tag=pfamazon01-20. In order to do a lot of the exercises in the book I need access to an oscilloscope, function...

I am a sophomore at college and I am double majoring in Electrical Engineering and Physics. I am very excited about building stuff and I am looking for affordable electronics kits that would be suitable for a college level and that could get me started on advanced electronics hands-on work and...

I have been teaching myself electronics from "Fundamentals of Electric Circuits". Can somebody help me with the attached problem? I know the answer, as it is given in the back of the book. However the method used to arrive at the answer eludes me. The answer is -4.444V and 98.75W. I have been...

Hey guys, I'm kind of building from my previous post of self-study. I am interested in the construction/building of computer parts and sciences. I was wondering if anybody could help me construct a list of topics (in sequence preferably) along with appropriate texts to learn what's listed? I...

Hi. I am now to choose what I must study for engineering. So,I wanted some help.Everyone says "you must take what you like and what you will enjoy doing and what will make your job enjoyable". But,I don't know what I'll learn in engineering and what job I'll have to do. (I have to pick among...

I am a graduate student studying in an engineering university in Electrical and electronic engineering for Bsc degree. After graduation I want to study/research in theoretical Physics(Postgraduate /masters/PhD). What should be my way ? I m very interested in Physics from school level and have a...

The basic idea: I'm entering undergrad, I want to be a theoretical (astro)physicist, that is to say I may deviate towards nuclear physics at a later time, though the chances are quite slim. Where I study, we need to opt for three subjects spread over six semesters each and without doubt I...

Hi everyone. I'm currently preparing for my upcoming mid year exam which examines: -motion in one and two dimensions -electronics and photonics -special relativity. I am in year 12, so I was hoping that you may be able to recommend some free exam papers/ any resources that could...

This was my circuit, and they asked me to find the potential between a and bI had no clue how to combine the voltages, I stupidly added them...but the weird thing is that they appear to both contribute to the main voltage and counter each other! I feel really bad now because I'm sure I made a...

Ive bought a few electronics books but they all seem to have the same thing in common. They are full of equations (not a bad thing) but very little explanation, and the explanation they do have is almost like the equation in words. Im trying to find a book that would explain what is actually...

Hi, I'm an italian electronics engineer. I got the bachelor degree, and the next year I'll get the master degree. Electronics and Physics fascinate me. I'd like to work in the research environment, but I'm not sure about this choice. In Italy the situation for researchers is not good (see brain...

Sorry for jumping through topics, I just have an electronics test tomorrow and I want to see I fully understand grounding points. Homework Statement So I made up this circuit and found its voltage drop at every point http://img137.imageshack.us/img137/3352/volts1.jpg Now if I set Vab = 0...

my question may be silly . I want to know why we study orcad or any other simuator software, i mean how powerful are these tools? I cannot build circuits for my hobby due to cost factor, so is it equivalent to do that on orcad?

Hi everyone, first time poster on Physics forum here. I'm working on a school project to make a device to read QR code. I'm strapped for cash so I'm trying to figure out if I can recycle some parts from used electronics. Looking for the following parts: - a graphic LCD display - an arduino...

Hi, Would I be correct in saying that we do not use AC current in electronics because in the circuits, the presence of current would be a "1" and no current would be a "0". Thus with DC on = "1", off = "0". With AC, the current becomes zero 60 times a second (for 60 Hz) and thus would not...

Does anyone know of any useful electronic books? I've gone through a lot of books and none have satisfied me. I'm not looking for a basic electronics book. I'm looking for a book that actually shows you how to parameterize a circuit with differential equations. Like how to find the current at...

Hi. In the attached document, is the potential difference across the resistor 0V or 15V? I have read two different books that say two different things. Personally I thought 0V seemed correct because no current is flowing hence how can there be a potential difference?

Hello, I'm bit confused about relation of the two, would be really great if someone explained it. So the coulumb is said to be the force between two charges(repelling or attracting), which depends on quantity of charges and their distance. Joule is said to be force that is needed to move...

Homework Statement http://img560.imageshack.us/img560/2759/theprob.jpg Calculate the direction and value of I1 going through R1 The Attempt at a Solution Can you let me know if this is correct? Seems to make sense to me. http://img220.imageshack.us/img220/8484/72041802.jpg

I am a person who likes studying about fixing,joining and playing with objects. However cnsidering the many merit points that computer engineering has over electronics engineering(in terms of salary,placement,level of diff.)..I'm confused. Also the fact that comp engg. has some amount of...

i need help to find : 1) a surface area and volume of a c60 molecule. Assume the structure is a truncated icosahedron (Faces=32, Edges=90 and Vertices=60). The mean c60 diameter is 0.68nm but Van der Waals diameter is closer to 1nm. 2) electronic properties of c60 molecule, like how many...

Homework Statement Find an expression for x(t) and plot on graph T < 0 < 3T v = 4 for t < 0 = 1 for t >= 0T is time const. Homework Equations Voltage across capacitor cannot change instantlyThe Attempt at a Solution Well the transfer equation is \frac{X}{Y}(jw) = \frac{2+jwC}{1+jwC}...

I just need to find the Req of the circuit. Everything is attached. Ignore the fact there's no R4. Is it correct?

"conceptual" electronics book Hello, :wink: I have seen some books which do not explain give any conceptual background to electronics concepts. They use math to explain everything. I am in search of a book which first explains the concepts from conceptual point of view then comes to simple...

Hello, I'm just a poor little boy who is mystified about getting a start in the wonderful world of electronics. Do any of you have suggestions for books, tutorials, starter kits, etc. that you think are particularly effective in teaching fundamentals and setting you on the path to becoming a...

Homework Statement A PMAC machine is connected in Y and has 4 poles. I_F\,=\,27\,A and L_m\,=\,20\,mH. a) It is to operate at a torque of 35 Nm and at a speed of 4000 RPM. Calculate the necessary stator current I_S and voltage V_{S\,line-to-line} so that the losses are minimal. b) If the...

I frequent the community around the Electronics Engineering Video Blog. Apparently the host Dave Jones found a neat little quirk. https://www.youtube.com/watch?v=XZ4r8Rc5aus A member of the forum confirmed that it worked on the CMOS version, only if the voltage was 7.555V too. What do you...

I am designing an electronics project on knight rider using breadboard ,led etc. the problem is that i don't know meaning , uses, applications of knight rider though i searched various websites of electronic projects. please help me i have time till sunday i have to submit on monday.\ tHANKS...

I have wondered, why do non - solid-state electronics typically precede solid-state in the history of development? The two main reasons that I have thought of are limited knowledge of physical phenomena, and limitations in other technology used to construct the device (e.g., involving small...

I see more and more that any professor or REU program wants one of three skills: programming (which I am in the process of obtaining), fabrication/machining/welding(which I know very well), or electronics knowledge, the latter which I do not have and have no idea even where to start. I know...

Homework Statement A three phase, 6-pole, \Delta connected induction motor is rated 208V, 60Hz. It has R_R\,=\,5.2\,\Omega, R_S\,=\,2.2\,\Omega, X_m\,=\,220\,\Omega, X_{lr}\,=\,7.5\,\Omega, X_{ls}\,=\,2.3\,\Omega. Calculate the starting torque and both phase and line currents when the motor...

How far is the distance between mechatronics and electronic? It seems to me mechatronics is basically electronics with more focus on mechanics and materials, right? And, as a side note, do you study software programming in mechatronics?

Homework Statement Design a rectifier with a zener diode that satisfies the following: Primary voltage = 120V @ 60Hz VDC = 12V IR2 = 100 mA (R2 being the load) Vr(R2) <= .3V Homework Equations C=IDC/(2fVr) IDC=IR3 + IR1 The Attempt at a Solution I tried calculating the...

A). Would a 1/4 or a 1/8 TRRS to USB adapter work with 3.1 speakers and would you need software to make it work?, also what would the software be like, would it come with the product or could it be scripted from a good programmer and made available for download from a reliable website or a few...

I study Mechatronics, but my dream is actually getting into brain-computer interfaces. I think that's more electronics, but I'm such a newbie that I have no clue what I should really study (probably takes a good chunk of neuroscience as well...). Now, don't ask me how, but I got stuck in...

Hi I need assistance with ma electronics project.I need a site to get schematics and materials for building an automatic gate prototype using light sensor with or without micro-controller.thanks for any help

Alternatives to "Mesoscopic Electronics in Solid State Nanostructures" Greetings. I'm having a course called "Quantum Electronics", and one of the textbooks is "Mesoscopic Electronics in Solid State Nanostructures" by Thomas Heinzel. However, I find the book is often skipping an explanation...

I was just wondering if anybody does electronics projects at home, as a hobby. What kind of equipment do you have, and what are the essentials and associated costs? I am thinking of maybe doing some stuff at home because the hobbyist industry really seems to be expanding. There's places...

Are there any large kits I could buy to practice circuits from the book? What about kits for any other famous EE textbooks? Especially for digital circuits? And how expensive would they be? == I know that it varies from person to person - but - how long do the circuits in the second half of...

Could anyone suggest me good books on power electronics,power systems and calculus?I belong to Electrical and electronics department.

Hi, I am a student at the University of Waterloo and am entering my 3rd year of my BSc. I have an elective this semester and I thought I would take an electronics course. I feel like it would be useful for a bunch of things. In terms of my future career, and what skills would be...

What is an emitter follower? I want to know its working principle with proper circuit diagram..