Electrical Definition and 1000 Threads

Did a practice test but I would like to understand these two questions a bit more. I know the answers to both but that doesn't mean anything if i don't get it. Any help would be appreciated A very small 4.8-g particle carrying a charge of +9.9 μC is fired with an initial speed of directly...

Homework Statement Given a electrical circuit as one below One can find the transfer function For second order systems this can be written as I know that the damping coefficient can be found using the following formula In the over damped case ζ>1 can easily occur depending on the...

Electrical Science -- LR Time Constant & Voltage Drops 1. An inductor of negligible resistance and an inductance of 0.2 H is connected in series with a 330 Ω resistor to a 12V d.c. supply. Determine: (a) the time constant of the circuit (b) the voltage drop across the inductor after two...

hello frnz i m aiming to provide a compensation scheme for electrical arc furnance but i don't have practical data to deal with.Is there anyone who could provide me rating of electric arc furnace (KVA rating n power factor).

Hi, I am massively confused with what resistance is and how it applies to circuits and would be very grateful if someone could help. I know this sounds like a basic question but I have been reading for hours and the more I read the less it makes sense. My book says that resistance is 'the...

Homework Statement Show that when a plane wave is transmitted through a thin lens of focal length f in a direction parallel to the axis of the lens, it is converted into a paraboloidal wave (the Fresnel approximation of a spherical wave) centered about a point at a distance f from the lens...

Hello, I am design electrical engieer, & as part of my job i am responsible to prepare fabrication & detail drawings. However this requires extensive experience in yard & fabrication work, since there is a lot of consumbale items that need previous experience to make the correct details &...

When speaking of filtering noise of an input or output, are the texts referring to the actual electrical components of a digital pid controller? Capacitors, resistors etc...

Hello, So I assume, ionization occurs, when an electron has enough energy to either overcome the potential (Coulomb) barrier, or tunnel right through it (or can the overcoming of the barrier even be described as a 100% chance of tunneling?). If an alpha particle interacts with an atom, it...

Homework Statement A person gains weight by adding fat - and therefore adding girth - to his body and his limbs, with the amount of muscle remaining constant. How will this affect the electrical resistance of his limbs? a. the resistance will stay the same b. the resistance will...

Hey! Are there any good softwares for PC that can simulate electrical circuits that you can recommend? /A new EE student.

This is essentially the problem. And this is what I did. Realizing the following: E = -▽V I simply took the derivative in regards to the vertical component, in this case "a". So: -dV/da [the above formulae] And I got the following: Κλl/(a sqrt(l^2+a^2)) Does that seem about right...

Hello everyone, I'm new to this forum. I'm only 19 years old but I want to major in Electrical & Electronics engineering. So besides some practical skill I've learned from working with my dad I have a lot to learn especially in terms of theory. During my experience I've heard a few companies...

Homework Statement \dot{} I'm given the following circuit http://imagizer.imageshack.us/v2/800x600q90/43/bwka.png Homework Equations The Attempt at a Solution I come up with the transfer function to be G(s) = \frac{s}{2+\frac{1}{s}}. The question asks me to Plot step...

Homework Statement Here is a picture of the diagram. http://gyazo.com/f1b7051fda5b9e1d3a185c53abde1211 I must use the Gauss Jordan elimination method and solve for X1, X2 and X3 I am having problems setting up my equations Homework Equations The Attempt at a Solution...

Hello! I'm looking into getting an electrical engineering degree. I understand that there is a very wide variety of electrical engineers, located all over the world, but my questions are a little more specific. I noticed there's a demand for electrical engineers in Texas and surrounding...

Good evening (afternoon, morning, depending on where you are), I'm very interested in Arizona State University's Electrical Engineering program. It is one hundred percent online, just like the title says, and the labs are given to the student in kits. The advisers can't give me more...

Homework Statement A dc current of 3 A flows through an initially discharged capacitor. After 2 micro s what is the electrical charge on the capacitor? Homework Equations q(t)= integral i(t) dt between t=0 and t The Attempt at a Solution (3t^2)/2=6x10^-12 C. Is this right?

I want to be an electrical engineer or mining engineer when I grow up and I want to get a BS in both of those fields, but I was just wondering if I could get a job as a video game designer with a degree in electrical engineering.

Does Santa Monica College offer Electrical Engineering major? If so, do they have strong programs in electrical engineering? If not, then can you suggest me some community colleges that have strong programs in electrical engineering?

How can I get an AC voltage from a 12volts battery supply? Please help me out.

1. I would like to test myself on how well I know my information about certain metals, some of them get me a bit puzzled. How would you rate the electrical conductivity of cast iron? Poor, good, excellent or best? Also the thermal conductivity of 304 stainless steel? Poor, good, excellent or...

I would like to test myself on how well I know my information about certain metals, some of them get me a bit puzzled. How would you rate the electrical conductivity of cast iron? Poor, good, excellent or best? Also the thermal conductivity of 304 stainless steel? Poor, good, excellent...

I need to interview an electrical engineer for a school project and I've been looking on the internet for days how to do it. I need someone who has graduated from college and is working as an engineer, I would really appreciate it! What engineering skills have you developed in the past year...

Homework Statement If a 0.505m long wire is excited into its lowest electrical resonance by a 2.2E7 Hz electrical oscillator, what is the ratio of the speed of the electrical current to that of light? Assume that the wire is like a tube with both ends closed. f=2.2E7 L=0.505 v=...

My question is just like my title. Do electrical engineers do anything besides circuit work? Because I would like to learn more about guys career but circuits is all I find.

Homework Statement Using circuit analysis calculate the inductance (L) within an electrical 50hz AC circuit containing a 12Ω resistor and inductive reactance of 5Ω which are in series. Homework Equations Inductive reactance: XL = 2∏FL Therefore inductance: L = XL\2∏F The Attempt at a...

There are several possible topologies for an electrical circuit. However, if we limit our circuit to be a two terminal device, how will this limit the options for the different topologies? I am a beginner in this field, but as far as I can tell by drawing the circuits, the only possible...

Hi Everyone, I originally have a BSc in Computer Science, and worked as a software Dev for 4 years, I have not returned to school and am entering my 4th (and final) year of electrical engineering. I've done 2 co-ops with a mining company working in Maintenance and Reliability, and have 1...

Homework Statement Spherical Ball centered at origin uniform ##\rho## with a radius a. Find E along x-axis. Homework Equations ##E = \frac{\rho}{4\pi\epsilon_0}\int\int\int\frac{r^2*sin\theta}{r_\rho^2} d\phi d\theta dr## The Attempt at a Solution Evaluate E spherically along the...

Homework Statement The circuit has an unknown component that is a resistor or a voltage source, find which one it is and it's value. Homework Equations V=IR, KVL, KCL The Attempt at a Solution I first used KVL on the outer loop: 14-2I1-10=0 I1=2A Then on the...

A.) A 20-W compact fluorescent lamp replaces a 100-W incandescent bulb. How much energy does it save over its 10,000 hour lifetime? B.) At $0.10 per kilowatt-hour, how much money does this save? My attempt at answering: Difference is wattage is 80-W, multiplied by 10,000 hours is...

I'm a senior in high school and intend on double majoring in EE and mathematics starting in the fall of 2014. After undergraduate, I plan on either doing a master's and then a Phd or just going straight for a Phd after this. My main goal is to go into research in EE. Are there a lot of jobs for...

Hi. I'm a high school senior and I plan to go to UC Berkeley or Cal Poly Pomona and get my Bachelor's degree in electrical engineering. Will I get job after I graduate from college? And I want to get started by learning electrical engineering. How can I find the names of the textbooks for...

Homework Statement I'm given this configuration with a AC source at v_{i} with a R_{sig} connect to the source before the capacitor. R_{sig} = 0.6 KΩ R_{G} = 1 MΩ R_{D} = 2.7 KΩ R_{L} = 4.7 KΩ I_{DSS} = 10 mA v_{p} = -6 V Homework Equations The Attempt at a Solution...

Which is the best book for electrical circuit theory?

Homework Statement Find the voltage gain A_{v} http://imageshack.com/a/img692/3117/qkwp.png Homework Equations The Attempt at a Solution Is this the correct small signal equivalent? http://imageshack.com/a/img203/5812/1yfe.png I'm trying to find the output impedance...

One thing I always enjoyed about doing work is working with your hands and getting "dirty" so to say. I like putting in a hard day's work that has a physical aspect to it. But I also really like doing the math and thinking critically and solving hard and complex problems using a more mental and...

Homework Statement If all the solid waste of 230 million tonnes were burned in waste-to-energy power plants that are 20% efficient, a) how many kilowatt-hours of electrical energy could be produced in a year? Compare this quantity with the total U.S. electrical energy production of...

Hi, Homework Statement Attached (Q1,Q2) are two mechanical systems I am asked to convert into analogous electrical circuits. In Q2, it was stated that B4 is the friction between each of the three masses and the surface. Homework Equations The Attempt at a Solution Attached (Q1 -...

So I am at the point in my electrical engineering degree where I get to choose electives, but because I feel like I'm not fully familiar with the classes I can choose from.. I've got a few questions: 1. what is radio systems about? Google tells me its about FM/AM radio broadcasts 2. do...

I'm wondering what are some 'niche jobs' or niche markets for Electrical Engineers? The kind of jobs that will always be in demand. I've heard that RF Engineers are always in demand, that there's a short supply and such...but what other fields are there within Electrical Engineering?

Homework Statement Given the configuration below http://img844.imageshack.us/img844/3364/c5e8.png Find A_{V} and A_{I} Homework Equations The Attempt at a Solution I start off by drawing the small signal equivalent r_{e} model. http://imageshack.us/a/img268/7201/9e.png I start off by...

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...