Electrical Definition and 1000 Threads

Hello. I entered my home to find that a light was on. I definitely did not leave the light on when I left. When I looked at the switch, it was burnt and there was smoke residue everywhere on the mirrors and a burnt smell in the room. I went to turn it on and there was a hot heat coming from the...

I have to investigate electrical impedance to make progress on a project. Does anyone know of any good resources to begin to understand impedance and reactance, particularly relating to circuits containing inductors and capacitors? I am trying to investigate impedance responses of these circuits...

Hi. Getting straight to the point, what is the difference between electrical potential energy and electric potential? Please be as specific as you can. Thank you.

Homework Statement It is the driven series RLC circuit. It is given in the following images. It is from the section 12.3 in this note. Homework Equations The differential equation, as given by 12.3.3, is ##L \frac{d^2 Q}{d t^2} + R \frac{d Q}{d t} + \frac{Q}{C} = V_0 \sin{(\omega t)}##...

Hello, I am building a small car that upon hitting a wall will go backwards, in other words reverse the current flow. I have all the components requiered (resistors 3k and 1k, wires, 6V battery, and an H-bridge, locking button) only thing I do not know is how to connect them all together. If...

What would be the theoretical relationship between/ a formula for the salt concentration in distilled water and its electrical resistance?

Hey, so I'm just wondering what are the formulas needed to calculate the temperature of a wire after x amount of time as an electrical current is passed through it. I know how to solve for it... I just forgot the formulas. Thanks

Homework Statement A 400 kV transmission line has a length of 500 km and a reactance of 0,4 Ω/km. How much power can you transmit, if the power angle (the angle between the voltages of the beginning and the end) is limited to 25 degrees? What would then be the line’s boundary power limit for...

Homework Statement In my lab, we are studying the efficiency of a simple DC motor. In order to do this, we related the initial potential energy of the capacitor to the final potential energy of a mass (which remained constant for all three capacitors) that the motor lifted. I was instructed...

Homework Statement Three point charges of +6.00 μC, +4.00 [/B]μC, and +6.00 μC are placed along the x-axis 0.200 m above the +4.00 μC charge as shown in the figure below. What is the electrical potential at point P (relative to infinity) due to these charges? Diagram...

In regards to voltage and electrical potential, I have a question. I understand the voltage to be the difference in electrical potential of two separate points. So in an analogy am I correct to compare this to a bowling ball being 4 feet off the ground. So the bowling ball has a gravitational...

Homework Statement An alternating current, with the current value of i = 3*cos314*t, is split into two parts in point A (each part with its own thermal resistance, R1 = 60Ω and R2 = 40Ω), which then connect again in point B. What is the released heat in the part between point A and point B...

While cleaning out an old house I found this book. I have later (much) copies of this book that I often refer to. A little mouse chewed but nonetheless a nifty find. Was amused there is a chapter on knob and tube wiring. - -

Hi I'm trying to calculate the power loss over an electrical cable. The information of the system is: Maximum current of 20.92 A per unit at 34.5kV The cable has the following properties: DC Resistance at 25 deg C (0.1672 ohms/1000 ft) AC Resistance at 25 deg C (0.1672 ohms/1000ft) The length...

Homework Statement So, for a school project I have to make a resistance soldering iron. As far as I know, this requires a high current going through high resistance wire (such as stainless steel in my case). I need to make this run from a standard 120v 15A wall outlet. I have figured out so far...

I dabble in building software models of alternate physical theories

There is this debate in car audio forums of this question whether it is better to connect your amp ground to the frame of the car or the battery.. basically they haven't came to a conclusion so I was curious what you guys think... Basically what I mean is that when you hook up an amp in the...

Homework Statement In the following picture, the absolute value of the difference in electric potential, between points A and B is: A)5V B)4V C)3V D)1V E)0V Homework Equations E =qV V = iRThe Attempt at a Solution I have no idea where to start on this one, just started my electric circuits...

i am planning to do a small diy wireless power transfer device. The circuit of the transmitter is receiver has just the coil and load arrangement. my query is, (please correct me if am wrong) -->to induce a voltage in the secondary coil, there must be a varying magnetic field right? -->but...

Hi all, I'm doing a little project about the wear of materials for tools for cutting machines.Yesterday, I was reading wikipedia page about electrical resistivity and I thought if it might be possible to evaluate the estimate the material loss of the tool through the measure of electrical...

Assuming the resistance of a wire in a series circuit, consisting only of 1 component (e.g. filament lamp) and a battery, is negligible; does each Coulomb of charge commit all of its electrical potential energy, supplied by the battery's potential difference, as work done across the component...

Hello I didn't find a similar question, but if it's redundant, please erase this thread. The instant electrical power is not constant (because of the consumption and of the production). So, how the instant power is adjusted in the electrical grid? There is a similar entry, but it has several...

Homework Statement A power plant burns coal and generates an average of 700.0 Megawatts (MW) of electrical power while discharging 1162.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. Homework Equations W = J/sec The Attempt at a Solution...

hello all, I am currently a college student studying energy systems engineering, i was just wondering if there are any ways to get into the habit of understanding math it's not my strongest subject. Also just a random thought, where do you think energy/ electrical engineering will be in the...

I am a high school senior debating between these two majors. In high school, I enjoyed both Mechanics and E&M very much so its really tough for me to decide which of the two engineering fields I'll like more. Whichever field I pick, I am also planning to minor or double in Physics and Computer...

Can I major in Electrical Engineering and Biology and become a Biomedical engineer? I want to be a Biomedical engineer but the school I am going to only has environmental, electrical, and mechanical.

Hello community. I have a question about electrical heating. I am familiar with the fact that textbooks explain how power losses are reduced by transmitting at high V and low I since P = I^2 X R (equation from Ohm's law and P=I X V) But if you use a different sub for P = I V then you get P =...

Hi everybody... I'm new and was hoping some one could suggest reasonable options for electrical transmission over 1.5 km I live in costa rica wilderness off grid . Electrical power lines are 1.5 km away... brief history... I have electrical lines running 1.2 km to my helpers house ... but...

Hello everyone, I want to give some brief background info about myself before asking; I am a junior/senior undergraduate living in Southern California studying mechanical engineering, and leaning towards the thermo/fluids side of mechanical engineering. However, when it comes to "my true...

I am going to be getting my A.S. in Mechanical Engineering by the end of next semester; however, I am not sure if I should pursue a B.S. in ME or EE. Both degrees would take me 3 years to finish (ME will be 12 credits a semester and one part time semester, EE will be 13-15 a semester. I can't...

When a voltage gradient across a dielectric becomes too large, the material will break down and become conductive, mostly because of plasma ionization. Thus we get lighning, static electricity fingertip shocks, and tesla coil shows. But often during such breakdowns, there are multiple...

All, I am not sure if this is the right forum for this but I believe it is the closest to the question I would like an answer to. I would like to calculate the electrical force between Mars and the Earth. I believe I understand that in order to do this, I must apply Coulomb's law: E=...

If this is not ok to post then let me know, but I have a question that I feel can only be answered here. Question: Would it be possible to heat a 50' semi trailer frame to roughly 400F through electrical resistance, I know it would require a lot of power but the reason I ask is because I am...

Something like this was on this site, but I'm still not sure if this is possible. I have this concept of taking old appliances, disassembling them, and recombining components in useful ways. I'm wondering if I can use the electric motors, in, eg, washing machines as electrical generators if I...

What is required to bring hydro lines on towers together?

An 8.25 kW shunt DC motor is supplied with a terminal DC voltage of 300 V. The armature resistance of the motor Ra is 0.25 , and the field resistance Rf is 40 . The field winding consists of 1500 turns. An adjustable resistance Radj is connected in series to the field winding. Radj may be...

Hi Everyone, I'm planning to apply for MS in Electrical Engineering with specialization in Computer Engineering. I have BS degree in Applied Mathematics with Emphasis in Computational Science. My question is what physics or engineering classes would you recommend to take before starting the...

Homework Statement A metal ball of radius ##a## is at a distance ##h>>a## from a very long conducting non-charged horizontal metal surface. Calculate the maximum electrical force on a ball under the condition that ##E_{cr}## the critical electric field of air is not breached. Homework Equations...

1. The problem stsatemesnt, all variables and given/known data A cylinder conductor of length ##l##, inner radius ##a## and outer radius ##b## is half-filled with a liquid dielectric as shown in the picture. The cylinder is attached to a battery of constant voltage ##U## and then separated from...

I am an analog electrical engineer by trade engaged in self teaching myself Analysis / Particle Physics and Astrophysics for the last couple of years. I have worked in the computer graphics field for almost 30 years, ranging from hardware / chip design / device drivers and compilers with 30...

I am a high school student interested in electronics. I have been able to understand almost everything about electricity and digital computers mosfets, logic gates,memory,cpu, fetching ,decoding, executing ,clock cycles, etc. except there is one thing that I can't seem to grasp my head around...

Hi guys! I study Electrical Engineering and, don't-know-why, I don't know anything about state space. Now I'm working on a project where I have a non-linear system. The first task in the project is to separate the linear and the non-linear part of this system, and then obtain the state space...

Homework Statement The following picture illustrate how the current in the circuit changes when you change ##E_2##. Where slope 1 represents the current flowing through ##E_1## and slope 2 represents the current flowing through ##E2## Homework Equations Usual circuit laws :P The Attempt at...

I'd like to test the quality and performance of an electrical item I intend to sell. I was able to find a similar, very high quality product whose quality I'd like analyzed and compared to lower quality alternative. Who should I send these two product samples to? A third party inspection...

I have a few questions about earthing in electrical systems. 1) How can Earth be used as a "conductor"? I googled its resistance and it turns out that Earth resistance is not that large and it can be reliably used as a conductor. For example, I read it can be used as a return conductor in single...

Hi folks, I purchased two books on electric transport at the nanoscale and unfortunately I just found theoretical models and formalism... but the actual data from the experiments was not there. So I am curious about it, I am looking for information on nanowires, quantum dots etc and I would...

As per the diagram, how do i change the wiring of the equipment on the outside to achieve my desired setup?

What are the chances of getting an Entry-Level Electrical Engineering job 3 years after I graduated? I had a 3 year gap because I was getting my teaching degree. However, I did stay current with electrical engineering fundamentals / knowledge during those years.

I am doing a project for a course and it asks me to draw annotated drawings of the distribution network including generators, transmission systems, distribution system and low voltage loads which in general is all fine. However, I have come across a question that asks me to draw an annotated...

Hello everyone. I am a third year Electrical Engineering major and I am just starting to take some real EE courses such as Digital Logics and Microprocessors. I have to choose a track for electrical engineering and I am in a dilemma as I do not know which track I want to do. This falls under the...