NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
January 23, 2019, 09:31:16 pm *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 
   Home   Help Search Login Register  
Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
Google Bookmarks Yahoo My Web MSN Live Netscape Del.icio.us FURL Stumble Upon Delirious Ask FaceBook

Pages: [1]   Go Down
  Print  
Author Topic: A loop rotating in a magnetic field (How electric power generator works!  (Read 7433 times)
0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
on: April 12, 2010, 02:17:41 am » posted from:Uberaba,Minas Gerais,Brazil

This applet created by Prof Hwang
Modified by my self
I add tow bars for (sc) and (time)
Original project:A loop rotating in a magnetic field (How electric power generator works!)

Embed a running copy of this simulation

Embed a running copy link(show simulation in a popuped window)
Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!


* loop.jpg (39.18 KB, 636x573 - viewed 422 times.)
« Last Edit: April 21, 2010, 12:07:55 pm by ahmedelshfie » Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #1 on: April 21, 2010, 02:42:23 am » posted from:,,Brazil

When a loop rotating in a uniform magnetic field.
The magnetic flux is changing which will induce electric field along the loop (produce voltage).
If the loop is rotating with constant angular velocity \omega . (The angle is \omega t)
The magnetic flux in the loop will be \Psi =\int \vec{B}\cdot d\vec{A}= B A cos(\omega t)
So the induced emf = -\frac {d\Psi}{dt}=B A \omega sin(\omega t)

The following simulation show how it works dynamically.
« Last Edit: May 18, 2010, 07:52:55 am by ahmedelshfie » Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #2 on: April 21, 2010, 10:06:44 am » posted from:Taipei,T'ai-pei,Taiwan

You need to add TeX equation between $ to be displayed as equation.
I have added dollar sign for the above posted message for you!
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #3 on: April 21, 2010, 12:21:11 pm » posted from:Uberaba,Minas Gerais,Brazil

Yes prof,, i had the text information and equations from topic
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=912.0
So i think I'm make wrong right Huh
« Last Edit: April 22, 2010, 09:47:16 am by ahmedelshfie » Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #4 on: April 21, 2010, 04:50:40 pm » posted from:Taipei,T'ai-pei,Taiwan

You need to add dollar sign for those equations.
Otherwise, those equation would not be convert to image.

The following is what you have copied.
Code:
This simulation shows a current loop in uniform magnetic field.
The black arrows show the force due to magnetic field on the loop.
\vec{F}= q \vec{v} \times \vec{B} or \vec{F}= I \int d\vec{\ell} \times \vec{B}
The magnetic field in in the +Z direction if Bz>0.
Then ,torque for the loop is calculated from definition \vec{\tau}=\vec{r}\times\vec{F}

Because the current flow in the same counter-clockwise direction.
The force on the loop change sign during each helf cycle.
If we current reverse direction during each helf cycle, the following device can turn into a motor.
A voltage source is needed in the loop to drive the current.
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #5 on: April 21, 2010, 10:51:46 pm » posted from:Uberaba,Minas Gerais,Brazil

I understand prof so when i would typing any equations i add $ between equations
For convert to picture right
Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #6 on: April 22, 2010, 02:48:25 pm » posted from:Taipei,T'ai-pei,Taiwan

Yes!  Cheesy
Logged
ahmedelshfie
Moderator
Hero Member
*****
Offline Offline

Posts: 954



«
Embed this message
Reply #7 on: April 22, 2010, 05:19:06 pm » posted from:,,Brazil

Yes prof  Smiley
Logged
Pages: [1]   Go Up
  Print  
Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"
 
Jump to:  


Related Topics
Subject Started by Replies Views Last post
A super-conducting loop moving across a uniform magnetic field region.
Electromagnetism
Fu-Kwun Hwang 0 12243 Last post February 25, 2007, 08:25:39 pm
by Fu-Kwun Hwang
Cosmic Rays trapped Into Power Lines Magnetic Field
Request for physics Simulations
nalzayed 2 10387 Last post December 12, 2008, 09:55:05 pm
by nalzayed
Current Loop in magnetic field (How motor works!)
Electromagnetism
Fu-Kwun Hwang 11 45038 Last post April 16, 2011, 09:19:33 am
by Fu-Kwun Hwang
A loop rotating in a magnetic field (How electric power generator works!)
Electromagnetism
Fu-Kwun Hwang 5 53225 Last post December 12, 2009, 11:46:40 am
by Fu-Kwun Hwang
Current Loop in magnetic field (How motor works!)
electromagnetism
ahmedelshfie 0 4523 Last post June 08, 2010, 01:40:56 am
by ahmedelshfie
Powered by MySQL Powered by PHP Powered by SMF 1.1.13 | SMF © 2006-2011, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.203 seconds with 24 queries.since 2011/06/15