Electrical Definition and 1000 Threads

Hi there! Just say I have large square piece of some homogeneous resistive material like graphite. How would I go about determining the resistance between any two given points? Further, just say I supply a voltage across two arbitrary points, can I determine the voltage difference between any...

For instance, I was introduced to thevenin and norton theorems about 1-2 weeks ago and it seems like we're expected to rote memorize the algorithms on solving problems. There is no proof/logic explained in different circumstances. For instance, we're told what these theorems are and how they...

Im a recently graduated mechanical engineer and i just joined a construction company as an M & E engineer. i want to know the basics of electrical knowledge that a mechanical engineer should know. please advise me on this topic. i am willing to learn and expand my knowledge.

Thanks

Hello everyone, I am a junior year EEE student ( in a South Asian country ) and I will have to declare my thesis topic pretty soon. Anyway, the reason I am here is that I love Physics and want to migrate to something that is more heavy on the theoritical side. Things like particle physics...

Hi I'm new here basically thinking about getting a degree in EE, and the school that I'm interested has electronic engineering instead. Just wondering if I do the electronic engineering bachelor, you think I can still apply for MS in electrical if I don't have background in like power and...

I'm currently a second-year electrical engineering major (in the US). Next semester I'll begin to take almost exclusively classes involving different branches of electrical engineering. I've taken two digital design courses, a course on microprocessors, and I'm currently on my second "circuits...

What is the formula for speaker input/output? On a related topic, on a motor an input of x (electricity) equals output of y (movement) and an input of y (movement) equals output of x (electricity) x=y and y=x Is the theory of x=y / y=x applicable to speakers? x=electricity y=loudness

Homework Statement The tine sphere at the end of the weightless thread has a mass of .60g. It is immersed in air and exposed to a horizontal electric field of strength 700 N/C. The ball is in equlibrium in the position shown. What are the magnitude adn sign of the charge on the ball? Homework...

i am a 3rd year Mech batch doing my dissertation on developing an inductive sensor to determine wear in brake discs. As you know it works by inducing eddy currents into the disc and the are monitored by measuring the impedance of the coil. i am really struggling with understanding the impedance...

I need help. I am installing new networked alarm panels throughout a building. There is a room where one panel is and that panel is continually having components fail. While in this room it is also very common for me to receive a static shock when coming in contact with any metal. I realize...

Because there are only so many characters I can put in the title I will future explain down here. I want to do design/work on many things... I don't know how likely it is for me to do these things, but I want to work on electric motors, generators, nuclear reactors, Combustion engines, steam...

Hi All! A little background info. I'm working with cardiac pacemaking devices with the overall scope of implementing piezoelectric energy harvesters into the devices. I'm in the initial stages of research and development. Okay, so this is my conundrum: I have an output pulse circuit as shown...

Hi guys, I have completed my first year engineering courses and about to start my second year. I enrolled for computer engineering but have decided to change to either electrical or electronic engineering. So my main question is which is more harder between the two ? I know the main differences...

Here , I want to clear about the cause of electromagnetic or interaction torque.>! I am confused in two things.. I read that the flux produced by stator coil & rotor coil interacts , the interaction give rise to electromagnetic torque.. But how this interaction produce torque..?? Is it like...

I've always been fascinated by how a computer operates both through code and through its physical devices. This is my eternal struggle, I like both the software and hardware side of computers. I'd like to possible programming robots and use my electrical engineering design to know how to make...

I am taking an intro electrical circuits course which requires that I write extensive lab reports. I just completed a really simple lab about calculating resistance when configured in series and parallel, etc. In my intro I'm writing a short explanation about resistance, and resistors, and...

Dear PhysicsForums members, being currently in my final year of Austrian high school I have to decide what to pursue my Bachelors degree in. (Un)fortunately I have three huge interests. Those are Economics, Computer Science and Electrical Engineering. All of which are highly fascinating and I...

Dear readers, Firstly I would like to say that I'm a new member to the Physics Forum and I hope to meet many people who share my passion for science and, at present, engineering (because let's face it, science/engineering is awesome!). As a recent chemistry graduate at the University of...

Homework Statement Homework EquationsThe Attempt at a Solution I assumed there to be two supernodes. The first one was between V1 and V2. The second supernode was between V2 and V3. This is what i tried and i am not getting the right answers. Please can someone help me out! Apologies...

I am an electrical engineering undergrad student just finishing my first year. I have a love of physics and I was starting to wonder if it would be possible for me to stay in EE undergrad but change to physics for grad school. Is there enough physics in EE that I could make the switch?

Although it was drummed into me that electrical neutrality is preserved, I am perplexed by the phenomenon of radioactive decay. How is electrical neutrality maintained when electrons (beta particles) and proton-neutron sets (alpha particles) are being spit out by some elements. These particles...

electric transmission between 2 neurons is way faster than by chemical neurotransmitters... then why are there so few electric transmission based synapses in our body??

Homework Statement Two charges q = 9.0μ C are fixed in space a distance d = 1.5 cm apart, as shown in the figure. a) With V = 0 at infinity, what is the electric potential at point C? b) You bring a third charge q = 9.0μC from infinity to C. How much work must you do? c) What is the...

I recently got my Bachelor degree on Electrical Engineering and want to specialize in Telecommunications. My question is how could I become competitive against a Telecom. Engineer? Since I just have a very theoretical knowledge about analog and digital communications. What practical stuff should...

hopefully this post makes sense:/ I am in the process of creating a product that is a gag gift. The gag gift will be electrical and will be activated once the box that it is in is opened. I am wondering if anybody has any ideas on how I can get the product to recognize when the box is being...

Mentor note: Member warned about posting a question without the template 1. Find the electrical potential between A and B given that R1=R2=R4=100 Ohms; Power dissipated by R3 is 200 mW at 9 Volts [ code ] A---------R1-----------*------------------- | |...

I have questions based on my understanding on the home electrical system (USA). I am not a student, this is for my personal understanding. My understanding (please bear with me): Electrical power to the house Mains Panel comes from the secondary of the utility company transformer in the form...

Homework Statement Homework Equations 3. The Attempt at a Solution Z11 8 + 6 Z12 6 Z21 6 Z22 6 V1 = Z11 I1 + Z12 I2 V2 = Z21 I1 + Z22 I2

Pardon me if I stated the title incorrectly/ informally. I just want to say about the title is about the 220 V, 60 Hz source (present in our outlets also) in our house by which comes from nearby electrical post. I have four questions in this post/thread so kindly tell me if I need to edit this...

Homework Statement I am to find the thevenin equivalent circuit without the load resistor (to the left of terminals a &b Homework Equations From class notes: 1- Remove the load resistor 2- find the open circuit voltage across a & b 3- Remove all voltage sources (replace with short circuit)...

What are some good electrical engineering books for self study? I want to study electrical engineering and make my own little cpu (don't ask why).

Why electrical current is possible only with the presence of energy BANDs, rather than discrete energy levels. Thank you.

Hello All. This is my first post, and I hope it is not too simplistic, but I am out of my normal line of work here. I am trying to understand the relationships between flow, velocity, and cross sectional area with gases and fluids(air and water). Imagine a large vertical, cylindrical tank...

Reader, Forgive me if I break any of forum rules, as I am a newbie posting here. Today, last minute Christmas with my beloved other, I found some sort of vintage electrical device. I understand the basic principles behind what would be happening on the stand with electricity. However I am...

I know this question has been asked here a lot of times, and sorry for repeating it, but I guess every case is different and even though I got some valuable insights from other threads, I think a personalised one might help. I'm 15 and I live in Europe. I'm good at math and physics and I...

I have heard that photons are attracted by gravity. Does this apply to electrical or magnetic fields?

Hi all... practical applications here... I have questions about RV travel, or travel trailer/ 5th wheel and electrical safety. With taller RV's or trailers, there is a danger of striking low power lines in the more rural areas. My question is specifically and only about what happens *when*...

Homework Statement Charge q1 is fixed to a spring with constant k_s. It is at equilibrium initially and located r+x away from q2 (which is oppositely charged). The charge q1 is released and allowed to move closer to q2, pulling the spring and stopping. Now the charges are only r distance away...

Hi, Am I correct in thinking that for a positively charged spherical electrode, the charge is distributed radially from the entire surface of the sphere, and as such, the electric field is distributed in this way too? If an earthed electrode is then placed nearby, a high voltage would be...

Hi, I posted a thread a while back about a problem I had in a class, it has resolved itself fortunately but now I have another question. I am an undergraduate mathematics major and I initially planed to go to(and likely will go to) graduate school in applied mathematics. I have always had a...

Hello all, I am currently involved in a diagnostic project for an induction motor with suspected rotor stator contact. all critical dimensions have been checked but the question has been raised by none electrical observers: Does the location of the rotor bars effect the magnetic center line...

I need to know how much electricity a machine uses in kW please. On the machine information plate it states: 460 volts, 60 Hz, 161 amps, and it is a 3 phase. I took the readings for the volts and amps: Phase 1- 271 volts & 37.68 Amps Phase 2- 271 volts & 37.62 Amps Phase 3- 273 volts & 38 Amps...

Hello everyone, I have read a lot of the post here about being engineers and going on into astronomy or astrophysics. Thus, decided to join and ask for advice. I have a similar experience but I have a unique problem. I have an BSc in electrical engineering from a US university with focus on...

Hello there, My name is Sara and I have an electrical engineering degree from an American university and a physics degree in the field of nanophysics from a United Kingdom university. I would like to move to the field of astronomy and astrophysics. I joined this forum to learn, share...

Going to Electrical field..(high school student) I recently began applying to colleges. I am planning on attending a 2 year community college first, but the college only offers electrical engineering technology so I had a few questions. 1. What is the difference between Electrical Engineering...

So I am awere of everything in electromagnetism in physics,but lately I am enjoying in creating RC cars.But I only got to making a car going only forward,how can i make him turn?How could I transform only a part of the electrical energy into mechanical so that my RC car can turn left and right...

Homework Statement This isn't a 'homework' problem as such. I'm currently in University Physics II (E&M), and I've become really interested in magnetic monopoles. They haven't been discussed in any kind of depth in my course, but I'm trying to figure out how a magnetic monopole (if they exist)...

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...