Electrical Definition and 1000 Threads

Hi, I've had an idea for a school physics project but I'm not sure if it will work. I want to measure the volume of water in a fixed shape container by passing an electrical current though it and monitoring how the resistance changes (with a potential divider circuit). My idea is that if I...

Hello all, I'm an EE student who is curious about the possibilities of going to grad school in Physics. When I first started college I was a Math and Physics double major. However, I was pressured by peers and family to go into Engineering because of job prospects. Even though I've been content...

If the star's mass supposedly collapses into a single point, and it ends up having "said" zero volume, then how can people say that the hole has a specific spin or that it can have an angular momentum? Does it mean that the singularity is somehow still spinning, or maybe the spacetime around it...

i have deep interest in electrical and electronics components since i am small. so , i am thinking of studying E&E engineering. but , i have very little exposure to this field. Can someone share what the E&E guys do?

When you increase the resistance of a filament bulb more work is done on the bulb which means its temperature increases. This causes the ionic lattice to vibrate with a greater amplitude (since it has more kinetic energy). The conduction electrons now encounter more collisions, hence the...

I apologize in advance if my question is vague, but I am planning to become an electrical engineer and wish to give myself a big head start (if possible) I have already read https://www.physicsforums.com/index.php?posts/4828192 and I have been though physics in high school, so I have a basic...

Hello, I have a cylindrical aluminium tube ( Diameter- 8cm, Length-15 cm, Thickness - 0.5cm ). It is insulated from bottom and open from above. I want to raise the temperature inside the tube maximum upto 300 degree celcius in a controlled fashion. I want to use electric coils to heat it. Can...

This is a question I have always wanted to ask but was too nervous to. I am currently a EE and Math dual major at an engineering university. I really like EE and thoroughly enjoy the subject and the physics behind it. However, I noticed during lab I tend to struggle more than the other...

I'm in EE, and it seems that around my department, a huge majority of my fellow students spend a lot of their free time doing hobby projects with microcontrollers (mostly arduino and raspberry pi). I suppose that if I was doing something interesting with them, then I could enjoy it, but I've...

Homework Statement Hello! I've been really unsure of whether my solutions to the first problem and part (b) of the second are right. My book gives few examples and so I've been trying to look on other websites for resources. Sorry if this is a lot, but any and all help would be appreciated...

Homework Statement A resistor with R1 = 25.0Ω is connected to a battery that has negligible internal resistance and electrical energy is dissipated by R1 at a rate of 36.0W. If a second resistor R2 = 15.0Ω is connected in series with R1, what is the total rate at which electrical energy is...

Hi, please could someone explain why silver is a better conductor than, say, copper. Is it due to the fact that it has more conduction electrons than copper? I can't seem to find a definitive answer online. Thanks for any guidance offered.

Homework Statement Homework Equations Kirchoff's Voltage/Current Law The Attempt at a Solution I first started by summing up the currents at node 1, which is the intersection of 3 wires at the top, and node 2, which is between the capacitor and inductor. So, at node 1: $$ \sum i = -i(t) +...

Homework Statement Calculate the individual currents in I2 and I3 (See diagram). I basically need to know how I calculate the current at any point in that circuit and that would help me. Homework Equations V=IR Rseries=R1+R2... 1/Rparallel=1/R1+1/R2 The Attempt at a Solution I honestly have no...

I am going to complete my bachelors degree in EE in less than six months now. My areas of Interest are Electric Machines, Control Systems and Power Electronics. I am going to enter my final semester in December. I already have a job offer from a very good Company. They have asked me to join once...

I am a applied physics major with an emphasis in physical electronics (so basically I take a lot of solid state physics classes with my other normal physics classes), and I go accepted into a program where I start taking graduate classes during my last year of my bachelors (current year) and...

I'm a sophomore electrical engineering student, and I'm highly considering minoring in physics. I'm currently in Electricity and Magnetism. The minor is not entirely for professional purposes, though if it helps, then that's great, but it's also something I'd like to do for my own personal...

Homework Statement Been stuck on this problem. Any help will be greatly appreciated 1. The (actual) spacecraft Deep Space 1 tested an ion drive engine in which Xenon atoms were accelerated (maximum voltage of 1,300 volts), neutralized and used to provide thrust. The probe carried 74 kg of...

Hello, I am curious why in the resistivity formula you divide the length by the area? R=P*(L/A). I cannot figure why you would not take the L*A to get volume?

Hello all. I am not an electrical expert here, just know enough to wire basic things at home (i.e. switches, outlets, etc)...so please be kind. My situation is this. We recently bought a new house and have found a couple of mysteries. The biggest one is that there are several electrical...

Hi, i am a freshman in engineering school and i want to be a power engineer, but for some reasons i can't join the electrical engineering major, but i can join the mechatornics major, can i take this major then maybe take grad studies in power systems or do i have to be an electrical...

Hello, I am an Electrical Engineering student at the University of Georgia and will have to give a presentation on my dream job. I have to give specifics on what I would need to know. If I could get some input or maybe a job application that states the requirements. I know Electrical...

Hi! This is simple mesh analysis. I wanted to try to solve the problem with nodal analysis. 1. Homework Statement Homework Equations V = IR We are supposed to use mesh analysis or node analysis. The Attempt at a Solution [/B] First step: the two current sources (independent and...

Homework Statement How much percent can CPVs (Concentrated Photovoltaic cells) convert solar energy into electrical energy? Homework EquationsThe Attempt at a Solution According to this page, "http://www.benefits-of-recycling.com/solarenergycars-2/ ", 20% of solar energy is converted into...

Hello, I'm already done with undergraduate Electrical Engineering and was quite disappointed not to have studied Quantum Mechanics. I have some free time now and would like to know whether its possible to get a good grasp of the subject the same way physicists do. I'm not talking about popular...

Homework Statement https://www.physicsforums.com/attachments/question-jpg.73386/ the current go from a A N and n the 2nd current go from b B N and n the first thing, i make the matrix 27-4j -3 i1 230 <0 -3 27-4j x i2 = 230<0 x means the matrix multiplied to the next < means the degree then...

Q1: Use the graph (see attachment) to write the empirical equation V(r) for a charge cylindrical shell with appropriate constants, including units. Show all work. Q2: What is the interpretation of the horizontal axis intercept? Q3: What is the significance of the slope of the graph? I...

Homework Statement Req'd to calculate power avail for propulsion. Given 2x 475kW fuel cells, 6400 kWh lead-acid battery. Ships machinery power requirement is 1100 kW at any given time, and battery max discharge rate is 1.2 kW/kWh. Homework Equations I'm not sure I fully understand the how...

Homework Statement Find the electrical potential inside a spherical shell carrying a total charge Q by integrating over the surface.Homework Equations E=k q/r^2The Attempt at a Solution I know the answer is zero from Gauss's law, but I don't know how to do the integration to get it.

Hi, I'm in the early stage of my ph.d program in electrical engineering and I have realized I need to know more math (I'm in circuits). Problem is that I have no idea where to even begin. In my undergraduate, I took the basic math courses (calculus , DEQ, linear algebra) but these aren't...

What free books/pdfs or online learning tools(encyclopedias/notes) are there on electrical engineering that you recommend?

Hello, I'm a first year student going into mechanical engineering at the university of Waterloo in Canada. I initially chose this because I really wanted to work either with satellites or nuclear power plants and my teachers advised that a mechanical engineering degree would net me easy...

Can anyone tell me how to convert electrical lan signals into optical signals for wireless transmission via LEDs like they use it Li-Fi systems.

Indian school books say -- We define the electrical p.d. between two points in an electrical circuit carrying some current as the work done to move a unit charge from one point to other! =>V=W/Q But, my doubt is...since work done is directly proportional to distance between two points...

I am new to both Ansoft Maxwell and HFSS and attempting to simulate transients on a 3d structure. I have a structure (hood of a car) designed in catia V5. I have imported the file into maxwell as .stp file. The Model analysis status verifies 'good' for all the parts. The 3d modeler window now...

As many people know, you can use electrical energy to create magnetism (electromagnets) and you can use permanent magnets to create electrical energy through induction (generators, the rotor inducing the stator). So what is the relationship here? Magnetism is not a form of energy or an energy...

I am and EE and CS double major and I am not sure whether to take complex analysis or not. Linear algebra, multivariable calculus, differential equations and probability are compulsory but complex analysis and stochastic processes are optional, so I am wondering whether I should take them or...

I am having trouble taking classes to get full time status because my college only offers electrical engineering courses at night. I am looking for some physics classes that will prove useful in my field. I've heard some PE's with masters in engineering physics say they can derive solutions to...

I have been doing HVAC for 15 years and generators for the last 3. I'm 37 and will be working full time as I go to school. I'm wondering though where I should focus my major yet I do have lots of time. Since I'm only taking 2 classes this semester to get my feet wet. An English writing class and...

Hi all. So I've stalked the forum for the past few months or so and read more threads than I can count. Figured it was time to join up and post a bit. The title basically says everything I want to ask, but let me go into a bit more detail. I'm 21 and I graduated with a Physics B.S. this Spring...

Hi, everyone. I am a student studying physics in one of colleges in Wisconsin, and this school has a program called Dual Engineering. Through this program, I will get a physics BS degree and study one type of engineering in UW-Madison for another BS. I really debate myself these days...

Hello all, I am starting my sophomore year in EE and am wondering if anyone can shed some light on the typical engineering software I may run into and whether or not it will run on a Macbook Pro. Currently I am using one of these as my personal and work computer. I have enough money saved...

I'm trying to solve item "c" of this question about the electrical circuit depicted on the attached picture. The question is in Brazilian Portuguese, this would be a rough and not 100% gramatically correct translation: "In the circuit shown below on Pic. 1 (labeled "Electrical Circuit")...

Im 44 almost 45 and have returned to college to begin pursuing a degree as an Electrical Engineer. I know it will take a lot of work and a long time. Is this goal realistic?

Elecrical distrabution question if I may. I am not an EE and only an avid farmer with a nessesity for electrical knowlage. Here is my question. I am using two unlike transformers with the same values.( 5oKVA single phase 120/240-600V). Starting at the utility pole where I have 200amp 120/240V...

Hi, I am really very worried about doing a masters thesis in Electrical Engineering. I have never done research in that detail before except for my fourth year project. I am very confused as to what to do as I have some topics in mind in which I would like to do research on but not sure how...

I am going to attempt to explain a recent situation at our home and will most likely use the wrong terminology, so forgive my ignorance in advance. Also, when you answer, can you dumb it down for me so I actually get it? :wink: Last week part of the power to our home went out. I was...

I'm a non-electrical engineering student however want to gain knowledge and experience with different electrical programming systems. I'm confused however as to all the different components and their differences. For example, why/when would you choose a PLC over an Arduino board or do these two...

Is it possible to study quantum mechanics at post graduate level(M.S.) after a Bachelors degree(B.Tech) in electrical and electronics engineering? The reason I am asking this is in India, my locality lacks good science schools. So, I thought of doing my bachelors in EEE and then take up masters...

I tried to solve the following problem: There are 2 objects . The object m1 with charge q and the object m2 with charge q.(same charge).The object m2 is connected with a rope to the ceiling. at the initial state , m1 and m2 were on the same height. When the object m2 is placed in distance d...