Generators Definition and 300 Threads

i believe that superconducting generators are now in use,We have hydropower plants in our country still using the conventional generators. My idea for my masters dessertation would to replace these generators with the superconducting ones, and hopefully get better efficiency. Would this make a...

DISCLAIMER: This thread is a repost of another thread in the Nuclear/Particle Physics forum since I cannot delete that thread but this forum is more appropriate since it is more of a question in Nuclear Engineering than in Nuclear Physical theory. So I have been reading about the operational...

Hello, I don't understand how more loops in the AC generator create bigger voltage. I understand when we talk about magnetic flux how it happens (rate of change of surface that's penetrated by field lines), but there's also the explanation that says "if the magnetic field penetrates the paper...

I know that there are packet sniffers, but I'm wondering if a computer is not behind a router (such as cable modem or dsl with external ip setups (usually for multiple external ip's, one for each computer), if a program made to generate and output packets could directly generate a packet with a...

why does induced emf change in case of generators but remains constant in case of moving conductor?

In Paul Bland's book: Rings and Their Modules, we read the following text at the start of Section 2.2 Free Modules:https://www.physicsforums.com/attachments/3388In the above text we read: " ... ... Every submodule has at least one set of generators, namely the set N. ... " Now, I know that...

Hi everyone, What type of electrodes should I use for an AC saltwater MHD generator? I need something that is efficient yet corrosive resistant. Thanks

List every generator of each subgroup of order 8 in \mathbb{Z}_{32}. I was told to use the following theorem: Let G be a cyclic group of order n and suppose that a\in G is a generator of the group. If b=a^k, then the order of b is n/d, where d=\text{gcd}(k,n). However, I am unsure how this...

I'm curious to know whether these huge generators [700 MW, 2235 MW] are same in construction as small generators, except bigger frame, coils and magnets? Also they say Generator is Motor and vice versa. So does it mean those big generators can be used as Motor too? In reality is it wise to...

A paper I'm reading says "Our starting point is the SU(N) generalization of the quantum Heisenberg model: H=-J\sum_{\langle i,j \rangle}H_{ij}=\frac{J}{N}\sum_{\langle i,j \rangle}\sum_{\alpha , \beta =1}^N J_{\beta}^{\alpha}(i)J_{\alpha}^{\beta}(j) The J_{\beta}^{\alpha} are the generators of...

So I take <z10, +> this to be the group Z10 = {0,1,2,3,4,5,6,7,8,9} Mod 10 group of additive integers and I worked out the group generators, I won't do all of them but here's an example : <3> gives {3,6,9,2,5,8,1,4,7,0} on the other hand <2> gives {2,4,6,8,0} and that's it! but...

hi , i want to know that how calculate coil windings in the genarators, i want make a small genarator with magnetic and copper coil for 12 volt but i couldn't find a formula for number of coil cycle please guide me about this , thank u.

what is meant by parallel path in lap and wave windings of armature of an generator

how can we write and interpret Lorentz generators in light cone coordinates?

I have a basic question that still is not clear to me. In QM, various operators are generators of something (ie. momentum is a generator of linear translations, Ang. Mom the generator of Rotations and such) Question 1: Let us look at L, or a component, say Lz. When we operate on a...

i am having a difficulity understanding the concept of cyclic subgroup generators. may I be given an explanation with examples if possible of how you determine whether a function is a subgroup and when they say list all cyclic subgroups eg <Z_10,+>. show that Z_10 is generated by 2 and 5

I'm currently in a program to be a physics teacher and for an upcoming mock lesson plan I am going to show the scene from Jurassic Park where the kid gets blasted off the electric fence and talk about if it is realistic. To supplement my discussion I'll be using a Van de Graaff generator to...

Hey, I understand that damper windings are used to stabilize the speed of the rotor under varying loads. The rotor speed is decreased or increased by the induction principle. Physically the damped windings are some sort of copper bars inserted into the pole faces of a rotor and all...

Why do van de graff generators have a maximum voltage( charge on the sphere ) . Why can't they just accumulate charge on the sphere as large as we desire?

Hi, I am training to be a Building services engineer. I have come across a problem where I have to calculate the vibration from the generator and the transformer to the striation of the building.. how should I do it?

The Lorentz group generators, in any representation, satisfy the commutation relation [S^{\mu \nu}, S^{\rho \sigma}] = i \left( g^{\nu \rho}S^{\mu \sigma} -g^{\mu \rho} S^{\nu \sigma} -g^{\nu \sigma}S^{\mu \rho} +g^{\mu \sigma} S^{\nu \rho} \right) and the Lorentz transformation is...

Homework Statement When a generator turns at 60 Hz, the amplitude of the induced EMF is 50 V. What is its amplitude when it turns at 180 Hz if the magnetic field remains the same? Homework Equations ω = 2∏f ε = ε0sin ωt The Attempt at a Solution If f = 180 Hz, ω = 2∏(180 Hz)...

Suppose we have a Lagrangian \mathcal{L(\phi, \partial_\mu \phi)} over a field \phi, and some variation on the field \delta \phi. If this variation induces a variation \delta \mathcal{L} = \partial_\mu F^\mu for some function F^\mu, then Noether's Theorem tells us that if we construct the...

hi, friends. i am 15 and have made a device using electric motors and generators which is able to produce more "electrical output" than the "electrical input". i have won the national science fair with this but the problem is that the judges say i am braking the 2nd law of thermodynamics and...

Hey everyone Let's say I have two generators, a and b, with the following relations: a^{5}=b^{2}=E bab^{-1}=a^{-1}; Where E is the Identity element. What I've done so far is this - the number of elements of the group is the product of the exponents of both generators, which is 10...

If I have a pulse generator what is the current it can output? It doesn't say in the datasheets IF I have a 5V pulse and 50ohm output impedence am I supposed to believe it outputs 100mA? And then if my load is 1ohm I should get something near 100mA through it?

I'm trying to understand exactly how power plant generators increase power output. So I will explain what I think is right. To increase the power output of a generator more torque from the prime mover is required to increase the torque angle between the voltage impressed on the stator from...

Homework Statement I want to show that the set $$ <1,x,x^2,\cdots ,x^n> $$ forms a basis of the space $$ P_{n} $$ where $$ P_{n} $$ contains all polynomial functions up to fixed degree n. The Attempt at a Solution I have already shown that the set $$ <1,x,x^2,\cdots ,x^n> $$ is linearly...

I am actually quite confused on how a generator is supposed to be modeled... To add more power to a bus, we put more generators in parallel at the same voltage (which is the bus voltage). Therefore, I would say generators are current sources as more generator are put in parallel, more current...

I couldn't find the words to summarize my question perfectly in the title so I will clarify my question here. Say we have a group G in which every element can be written in the form g_1^{e_1} g_2^{e_2}...g_n^{e_n}, 0 ≤ e_i < |g_i| . Suppose that there exists a different set g_1', g_2', ...

So, I was wondering if a conducting loop was placed in orbit around the Earth would it be able to generate a current?

I was looking out for dedicated true random number generators and was surprised that there seem to be only very few around on the market. Anyone has experience here?

Suppose we have $$[Q^a,Q^b]=if^c_{ab}Q^c$$ where Q's are generators of a Lie algebra associated a SU(N) group. So Q's are traceless. Also we have $$[P^a,P^b]=0$$ where P's are generators of a Lie algebra associated to an Abelian group. We have the following relation between these generators...

Hello everyone, I'm going through some lecture notes and there are some things I don't understand about the whole derivation of the angular momentum multiplet. It's said that the skew-symmetric 3x3 matrices J_i are the infinitesimal generators of the rotation group SO(3). Later, however...

I have a decent background in generators and my brother had an idea for building one he wants me to help him out. Without getting into specifics, it would be a natural energy generator integrated into his home electrical system. I have run into some issues though as i am more familiar with...

Hi, everybody! I have done tons of research through the Internet, but still can't understand the Faraday's law and how a generator works. I understand, that inside coils, placed into a rotating magnet, current is generated. But why? What exactly happens to electrons, so they form current...

I think I am starting to understand various aspects of electrical generators, and I wanted to run this by the forum and have people correct my explanations, if needed. I understand there are many types of motors and this thought-experiment is just a permenant magnet near a coil. If anyone can...

Homework Statement Perhaps I should say first that this question stems from an attempt to show that in the group \langle x,y|x^7=y^3=1,yxy^{-1}=x^2 \rangle,\ \langle x \rangle is a normal subgroup. Let G be a group with a subgroup H . Let G be generated by A\subseteq G . Suppose...

Is there a general algorithm for taking the presentation of a group and get the permutation generators for the subgroup of A(S) to which the group is isomorphic? For example, given x^5=y^4=e, xy=f(c^2) how do I find (12345) and (1243), the permutations corresponding to x and y? BTW, the example...

Sorry if this is such a basic question, but I'm not sure about the answer and having trouble finding it in my textbook. If I have a cyclic group G with generator g, and a homomorphism θ: G --> H, does this mean that θ(g) is a generator of H?

I am confused with SU(2). How do you prove that the generators are pauli matrices (1/2 sigma)? I would appreciate any link or reference with details of all algebraic steps, taking one from the conditions of unitarity and det=1 to the well know exponential form. In general, how do you find...

I understand how {1} and {5} are generators of Z6. {1} = {1, 2, 3, 4, 5, 0} = {0, 1, 2, 3, 4, 5} {5} = {5, 4, 3, 2, 1, 0} = {0, 1, 2, 3, 4, 5} But my book also says that {2, 3} also generates Z6 since 2 + 3 = 5 such as {2,3,4} and {3,4} I believe. Thus every subgroup containing 2 and 3 must...

Hi all. I have a question about the properties of the generators of the SO(N) group. What kind of commutation relation they satisfy? Is it true that the generators λ are such that: $$\lambda^T=-\lambda$$ ?? Thank you very much

I hope someone can put me on the right track here. I need to derive the infinitesimal generator for a bridged gamma process and have come a bit stuck (its for a curve following stochastic control problem - don't ask). Any tips, papers, books that could guide me out of my hole would be greatly...

Generators in power stations are usually connected to step-up transformers to boost their output voltages for long distance power transmission, but why not just use a generator that has been designed and built to produce really high voltages and just connect the generator directly to...

(if I am not even wrong, please let me know :smile:) The generators of the (proper-orthochronous) Lorentz transformations are usually denoted by {J_{\mu \nu }} or by {M_{\mu \nu }}. They consist of angular momentum generators and boost generators. When discussing spinors, the notation changes...

I know this is a bit of a newbie question but I want to learn something about generators. I want to build a simple hand cranked generator. Just a hobby. Making coils, and using magnets is the easy part but I don't understand the specifics around this. Can anyone tell me how to determine...

Hey! I am studying group theory for particle physicists right now and I came across the following general question (Tell me if you think this rather belongs to the homework section, I am new here.) Say I am given a set of matrices which represent the generators of an algebra, but I don't know...

This is another theoretical question post of mine. I read somewhere that there is a huge temperature polar opposite change in space just from shielding ie shadow vs. exposed to sun. That was because of the absence of an atmosphere or "stuff to keep the heat" So, pulling numbers from...

I am trying to use generators and relations here. Let M ≤ S_5 be the subgroup generated by two transpositions t_1= (12) and t_2= (34). Let N = {g ∈S_5| gMg^(-1) = M} be the normalizer of M in S_5. Describe N by generators and relations. Show that N is a semidirect product of two Abelian...