The Gem and Jewelry World's foremost Resource on The Internet.
Re: [Orchid] MRI for metal workers  
  [Thread Prev] [Message Prev]      [Date Index]   [Thread Index]      [Message Next] [Thread Next]
From: Brian Symons
Date: Mon May 12 20:53:00 2008
 
     
========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

    A further comment about metals being magnetically attracted or not.
    Whilst metals like copper silver & gold can't be picked up by a
    STEADY magnetic field, if the magnetic field is fluctuating then it
    will induce an electric current in any conductive material. An
    electric field has an associated magnetic field to it so this can be
    attracted. 

    There are huge electromagnets that use this effect to pick up scrap
    aluminium, copper etc. In fact a simple version used for a science
    trick is a normal electromagnet with a copper or brass washer on the
    end. When the electromagnet is fed DC like normally done then it
    picks up ferrous items, but when fed AC then it acts as a
    transformer, induces the electric current in conductive materials &
    will pick up copper, silver, aluminium etc. If the conductive ring
    is hidden then it sure causes people to stare. 

    MRIs use huge magnetic fields so just the turning on & off of the
    field can cause the induced voltage effects. 

Regards,
Brian.
____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________

  Click to Visit  
     
  Navigate:  
   
  Orchid Resources:  
   Join & Post
 Invite a friend to join Orchid
 F.A.Q
 Galleries
 BenchExchange
 Orchid Message Archives [Subject Index] [Date Index]

Ganoksin now offers a number of ways for you to stay on top of the latest from Orchid!

  1. My Yahoo - Do you have a My Yahoo page? If so, you can easily read the latest Orchid posts on your personalized page by adding this feed:Add Orchid to My Yahoo!
  2. Add Orchid to myGoogle Add to my Google
  3. Read Orchid with NewsGator and Microsoft Outlook Add Orchid to Your  NewsGator
Support Orchid! - If you believe in what we're doing, you can help!

 
     
     

© Copyright 1996 - 2008, The Ganoksin Project