NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
January 26, 2021, 10:56:58 am *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
   Home   Help Search Login Register  
"Wisdom is the harmony, healthy and happiness in life." ...Wisdom
Google Bookmarks Yahoo My Web MSN Live Netscape Del.icio.us FURL Stumble Upon Delirious Ask FaceBook

Pages: [1]   Go Down
Author Topic: electron helical path simulation  (Read 9450 times)
0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Jr. Member
Offline Offline

Posts: 39

Embed this message
on: March 07, 2012, 07:06:13 pm »

hi, prof. would like to understand how electrons behave in a uniform magnetic field. why would they move in a helical path? any simulation? thanks
Fu-Kwun Hwang
Hero Member
Offline Offline

Posts: 3086

Embed this message
Reply #1 on: March 07, 2012, 08:08:04 pm » posted from:Taipei,T'ai-pei,Taiwan

If the initial velocity is zero then it will keep it that way.
If the initial velocity is in the same direction of the magnetic field, then the electron will move with constant velocity.
The force on the electron in the magnetic field is \vec{F}=q\vec{v}\times\vec{B}.
If the direction of vec{v} is parallel to direction of \vec{B}, then vec{F}=0.
so it will move with constant velocity.

If the direction of vec{v} is perpendicular to the magnetic field \vec{B}, then the force is also perpendicular to the velocity, so the force will only  change the direction of velocity -- and it is a circular motion.

If velocity contain both parallel component and normal component, it will move with helical path.

You are welcomed to check out Charged particle motion in E/B Field.
Pages: [1]   Go Up
"Wisdom is the harmony, healthy and happiness in life." ...Wisdom
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Electron diffraction through a single-slit pane
Molecular Workbench
concord 0 6820 Last post February 18, 2009, 04:22:49 am
by concord
Electron diffraction through a double-slit pane
Molecular Workbench
concord 0 6531 Last post February 18, 2009, 04:23:10 am
by concord
Electron-nucleus interactions
Molecular Workbench
concord 0 4889 Last post February 21, 2009, 08:23:33 pm
by concord
Low-energy electron diffraction
Molecular Workbench
concord 0 7917 Last post February 25, 2009, 08:48:16 pm
by concord
Helical Particle Waves
Request for physics Simulations
aliadams 0 5518 Last post October 10, 2009, 04:29:29 pm
by aliadams
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 0.48 seconds with 22 queries.since 2011/06/15