Electrical Definition and 1000 Threads

If electrons flow on the surface of a wire, why isn't copper coated aluminum wire used in electrical applications instead of solid copper wire? It would be more cost effective

Homework Statement Determine A_{V} and A_{i} given β_{D} = 8000 and V_{BE} = 1.6 V. http://img801.imageshack.us/img801/6272/44tv.png Homework Equations The Attempt at a Solution I'm not exactly sure how to solve this problem. This is a problem that my professor solved in class. The only...

I am currently at the point where I am deciding what major to apply for for university and have narrowed my choices down to these two majors. However, I am torn on which one to choose. I am interested both in the design of chips for computers, missiles, etc. but also in some of the...

Hello everyone! I am a freshman in electrical engineering and scheduling for next semester is coming up. I chose EE because I loved physics in high school and wanted to go into engineering and had to pick a field at the last minute. The idea of studying applied E&M was/is fascinating. I am...

Air typically has a very high but non zero resistance. Given that air is just a medium, and that space is also just a medium, does the vacuum of space have a fundamental constant of electrical resistance, or is the electrical resistance of space truly infinite? How is this proven one way or the...

Greetings all, I need some help identifying a piece of electrical equipment for work.. I myself am a mechanical engineer and have never seen something like this. I have attached pictures below. http://imgur.com/a/J0B8H My initial thoughts was that it was some kind of loadbank or...

Homework Statement Imagine that you've been invited to try out a new "hoversuit," and here's how it works: Someone has set up a large flat sheet, many kilometers across, somewhere on the Earth, and they've charged the sheet up to a uniform charge density σ = +2 x 10^-6 C/m^2. You are...

Hi! I've been searching all over for a recommendation to my problem, but I've come to the conclusion it'd be better to ask. I am a controls engineer, design and produce a lot of large scale automation products. Our system uses a basic PLC system tied to a plant management server rack running...

In an environment of Argon between two electrodes at a distance about 2 millimeter a current is discharged of about 19 amps and 30 volt DC. Which electrode get bombarded with the ion to dislodge particles of the surface ?

to start with... i love electrical engineering but i am even more interested in the deeper phenomena accompanying electrical engineering concepts. i do not have a glaring academic background...i did my under graduation from a mediocre university here in newdelhi(india). my flare for physics is...

I have completed a bachelor in electrical engineering. Because of my interest in physics I have decided to move to applied physics and I have been accepted for a Master program ''Physical Energy and measurement engineering'' from a prestigious technical university in Europe, of course with some...

What determines if a ligand will have a strong electrical field?

Hi. So, currently I'm a senior in high school taking classes at the community college (my high school is paying for them) and I am having trouble deciding between these two courses. I learned that General Physics w/ Calculus doesn't actually have that much calculus, and I already learned a...

Hi, I'm woundering whether this circuit has some kind of dedicated name in the field? https://dl.dropboxusercontent.com/u/22589354/VoltageDivider2.jpg It's not just the average voltage divider as it it influences the serial part as well the parallel part in the same time. And does...

Homework Statement (image attached) A). What is the total rate at which electrical energy is dissipated in the 5.0−Ω resistor? B). What is the total rate at which electrical energy is dissipated in the 9.0−Ω resistor? C). What is the power output of the 16.0-V battery? D). At what rate...

Ok. I understand like repel and opposite attract. There are these physics homework with 3 charges and find the force from 2 of them on one. I understand the math: the only problem is my signs are wrong due to not understanding the direction of the force. For example, There's a positive...

Hey guys! I made an account finally, I've been on here forever, but it is finally time for me to ask this question now that I am in college... For a few years now, almost everyone I have talked to tells me that single majors in engineering are useless, and that double majors are the way to...

I don't have extensive knowledge of electrical engineering so I need a little help. I want to make an electrical connection, but with one small hurdle. One wire must be stationary, and the other must be allowed to rotate. How would you guys go about solving this problem? My first thought...

I have heard that there is a device(s) that will ensure that electricity can flow only one way and not reverse. If this is correct I would like to know what it (they) are. I have also heard that a capacitor has this ability and would like confirmation or correction. Thank you

Homework Statement Determine the value of the voltage Vx across the 3A current source. Homework Equations The Attempt at a Solution I am really confused about how to do it. What I thought of is to find the voltage across the 4 ohm resistance which is 12 V. I though of subtracting...

Hello physicsforums. What causes noise in electrical cables and/or transformers and/or electrical stations ? By noise I mean mechanical sound waves like bzzzzzzzz, not signal noise. And what is the proper way to search in google for this, I could not find a wikipedia article on this.

Hi fellow physicist! I have some trouble with finding a valid argument, for why the superposition theorem should be fulfilled for electrical circuits - there only containing resistors, capacitors and inductors - where the sources of the emf. are connected in series. Thanks in advance.

My university is currently prescribing Vincent Del Toro book for electrical engineering fundamentals. I have read few chapters in the book but I don't think I can understand advanced theories from it... I don't understand the proof of superposition, delta to star conversions and so on.(I don't...

Besides learning how to solve problems through textbooks, how can electrical engineering be self-taught for the labs? Do you buy the materials? What are the necessary materials that you must have?

Hello everyone, i need some ideas for my final year electrical engineering project. Any new ideas related to solar energy or other renewable sources? Thank you for your time.

I have a list of questions I'd like to ask an electrical engineer. Not only is this for an assignment, but I truly would like to see why the responding electrical engineer chose this path. If you would please leave your email after responding to all the questions that would be great. You won't...

I am trying to calculate the output of a weight imposed on a electrical generator via a gearbox. Can anyone please help me with this? Let say the weight is 500 000 metric tonnes. How much electricity could this produce if putting a constant force on the gearbox? This is a theoretical...

Homework Statement [See image] https://www.physicsforums.com/attachments/61123 Homework Equations Electric force \vec{F}_{e}=k_{e}\frac{q^{2}}{d^{2}}\hat{r} Gravitational force = -mg\hat{j} Normal force = \vec{n} |\vec{n}|cos(θ) = |\vec{F}_{e}| |\vec{n}|sin(θ) = mg ... where θ is the...

What areas of electrical engineering research require good knowledge of quantum mechanics? I'm an EE major minoring in Physics (done 3 years). I know I want to do research, but I'm trying to figure out what area(s) of research I want to pursue. Of my classes my favourites have been the ones...

Is there any possibility to converting sound energy to electrical energy by using piezo electric material.

We know that the rate at which electrical work is done (electrical power) is defined as: P = I2*R , or: P = V2/R The formula P = V2/R implies that if the resistance of an electrical component (R) (for example, a light bulb) is decreased, the power consumption (P) will increase hence the...

Homework Statement Three equal point charges, each with charge 1.60μC , are placed at the vertices of an equilateral triangle whose sides are of length 0.600m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are...

Or are differences in how one engineer is trained such that you either become one or the other but not both?

Good evening to the PF members! I am -once again for those who remember my thread a couple months ago- confused about what to study after high school. I applied for electrical engineering, because even though my passion is physics, seeing the bad economical situation worsening, I decided I...

i want to become the physicist behind nuclear engineering or electrical engineering i want to study how particles and electrons work , how the nucleus work , but still i don't want to become someone studying something that has nothing to do with reality or someone who just applies knowledge...

Hi All It's been years since I've had to do any of these sort of problems and I've forgotten how to do these types of problems so I'm hoping one of you smart people can help. As much detail as possable please First Question I fairly certain I need to use ohm's law on this one but can't...

Hi guys, After reading a paper about electron scattering, I became very interested. So if an electron is traveling in empty space, the electron's potential (according to the paper) is supposedly: http://www.flickr.com/photos/31694672@N07/ (I used flickr and Glui to post the particular...

Hi I heard great things about this forum and thought I would post one of my questions here. I am currently a second year Engineering student pursuing a degree in Electrical Engineering. So far I have not taken much engineering electives except for thermodynamics and a programming class. So far I...

Hi everyone, I am an italian student (last year of high school) who would like to study engineering at university. I don't know which one to choose between electronics engineering or electrical engineering (I don't know whether there is this difference abroad) I just want to say something...

Mathematical method in electrical potential ?? Hi All, I need mathematical help from the topic electrical potential for lectures on physics by Richard Feynman. Need some help to understand mathematical method used here. question : 1) From electrical potential.png ( how this partial...

Hi there, new member here (**TL,DR is available at the bottom of this post**) As you may or may not know, if you were to put in a plate of zinc at one end and a plate of copper at the other, put them in an acid solution, electricity will be produced. More of that stuff here...

Can anyone tell me how to calculate electrical energy transferred when you are given a voltage and a charge? I'm really stuck as we haven't covered this before :-/

I am not sure if I am allowed to post these kinds of questions here (cause I see mostly hypothetical ones, but then again I didn't look too far down the page...) but I just have a quick question for you guys. I am trying to desolder some electrical components from a board but I don't have...

hi all here is my school curriculum : First Year : 1st semester ENG 101 college writing MTH 181 Calculus I CHM 261 General Chemistry I CHM 266 General Chemistry Lab I ESC 120 Intro To Engineering Design ESC 100 New Student Orientation semester 2: ENG 102 OR ESC...

I'm going into my second year of a 2 year electrical technology diploma (technologists are like middle men between engineers and technicians), and got hooked on discovery channels' show "biggest brain theory" recently. More than anything, the documenting of the contestants' work in the workshops...

How can i make electrical measurment of Oxide. I know i have make an ohmic contact to use that as an electrode. But how do i decide the metal for this contact. I want to use Ga2O3 Thanks in advance

Hi all, I would appreciate a little guidance on some circuit theory. I was wondering how a circuit behaves when there are, say two identical 10V cells, and a 1Ω bulb happily sitting in series, but then one connects another identical bulb between the two cells. Obviously the current in the first...

Hi, I'm done with my second year of electrical engineering and am interning at nVidia. So far all I see is people in cubicles debugging code and compiling kernels. Of course there's nothing wrong with it but I was disappointed because I chose electrical over computer science in the hope of...

My major interest is in electronics. I have my college admission counselling in two days, and I'm stuck with this dilemma of which branch to choose. I also have Computer Science engineering as an option. These vacations I took up C++ and it's going well. Question 1 Can I do my masters in...

My major interest is in electronics. I have my college admission counselling in two days, and I'm stuck with this dilemma of which branch to choose. I also have Computer Science engineering as an option. These vacations I took up C++ and it's going well. Question 1 Can I do my masters in...