The Naked Scientists

The Naked Scientists Forum

Author Topic: magnet measurement and manufacturer specs. problem  (Read 2730 times)

Offline labview1958

  • Sr. Member
  • ****
  • Posts: 104
    • View Profile
I have a brand new bar magnet rated as 1.23 Tesla by the manufacturer. However when I measured it with a meter, it gave a reading of 0.61 Tesl. Why?


 

Offline Soul Surfer

  • Neilep Level Member
  • ******
  • Posts: 3345
  • keep banging the rocks together
    • View Profile
    • ian kimber's web workspace
Re: magnet measurement and manufacturer specs. problem
« Reply #1 on: 24/03/2006 22:53:03 »
Permanent magnets are very susceptible to rough handling. If you have dropped the magnet or used the magnet in repulsion with a similar magnet as described in your experiments elsewhere you could quite easily have lost a significant amount of the initial magnetism. Also the actual field you measure will depend very much on the size and location of the sensor and it is important to do an exact mach on the way the manufacturers specify the measurements should be made to replicate their results.

Learn, create, test and tell
evolution rules in all things
God says so!
 

Offline labview1958

  • Sr. Member
  • ****
  • Posts: 104
    • View Profile
Re: magnet measurement and manufacturer specs. problem
« Reply #2 on: 25/03/2006 16:18:32 »
Let's say the Br of a magnet is 1.23 Tesla. If I put my probe touching the magnet, it reads 0.6 Tesla. is there something wrong? Does it mean Br of 1.23 Tesla is equivalent to 0.6 with a probe?
 

The Naked Scientists Forum

Re: magnet measurement and manufacturer specs. problem
« Reply #2 on: 25/03/2006 16:18:32 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums