Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: labview1958 on 24/03/2006 16:51:12

Title: magnet measurement and manufacturer specs. problem
Post by: labview1958 on 24/03/2006 16:51:12

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?

Title: Re: magnet measurement and manufacturer specs. problem
Post by: Soul Surfer 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.

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Title: Re: magnet measurement and manufacturer specs. problem
Post by: labview1958 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?